text:
{boosting, algorithmic methods, non-parametrics, CART, bagging, committee methods, Random Forests, ensemble},
date-added = {2010-01-03 19:44:09 +0100},
date-modified = {2010-01-03 19:47:43 +0100},
doi = {10.1214/07-SS033},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Siroky-2009-Statistics%20Surveys_Navigating%20Random%20Fo.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1227},
rating = {0}
}

@article{Clayton:2005p2928,
author = {David G Clayton and Neil M Walker and Deborah J Smyth and Rebecca Pask and Jason D Cooper and Lisa M Maier and Luc J Smink and Alex C Lam and Nigel R Ovington and Helen E Stevens and Sarah Nutland and Joanna M M Howson and Malek Faham and Martin Moorhead and Hywel B Jones and Matthew Falkowski and Paul Hardenbol and Thomas D Willis and John A Todd},
journal = {Nat Genet},
title = {Population structure, differential bias and genomic control in a large-scale, case-control association study},
abstract = {The main problems in drawing causal inferences from epidemiological case-control studies are confounding by unmeasured extraneous factors, selection bias and differential misclassification of exposure. In genetics the first of these, in the form of population structure, has dominated recent debate. Population structure explained part of the significant +11.2% inflation of test statistics we observed in an analysis of 6,322 nonsynonymous SNPs in 816 cases of type 1 diabetes and 877 population-based controls from Great Britain. The remainder of the inflation resulted from differential bias in genotype scoring between case and control DNA samples, which originated from two laboratories, causing false-positive associations. To avoid excluding SNPs and losing valuable information, we extended the genomic control method by applying a variable downweighting to each SNP.},
affiliation = {Juvenile Diabetes Research Foundation/Wellcome Trust Diabetes and Inflammation Laboratory, University of Cambridge, Cambridge Institute for Medical Research, Wellcome Trust/MRC Building, Cambridge, CB2 2XY, UK.},
number = {11},
pages = {1243--6},
volume = {37},
year = {2005},
month = {Nov},
language = {eng},
keywords = {Models: Genetic, Diabetes Mellitus: Type 1, Bias (Epidemiology), False Positive Reactions, Genotype, Case-Control Studies, Genetics: Population, Humans, Great Britain, Lymphocytes, DNA, Adolescent, Polymorphism: Single Nucleotide},
date-added = {2010-01-13 22:17:01 +0100},
date-modified = {2010-01-13 22:17:01 +0100},
doi = {10.1038/ng1653},
pii = {ng1653},
pmid = {16228001},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Clayton-2005-Nat%20Genet_Population%20structure.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2928},
rating = {0}
}

@article{Hakkarainen:2003p8022,
author = {Reeta Hakkarainen and Carolina Johansson and Tuula Kiesepp{\"a} and Timo Partonen and Markku Koskenvuo and Jaakko Kaprio and Jouko L{\"o}nnqvist},
journal = {BMC Psychiatry},
title = {Seasonal changes, sleep length and circadian preference among twins with bipolar disorder},
abstract = {BACKGROUND: We aimed at studying the seasonal changes in mood and behaviour, the distribution of hospital admissions by season, and the persistence of the circadian type in twins with bipolar disorder and their healthy co-twins. METHODS: All Finnish like-sex twins born from 1940 to 1969 were screened for a diagnosis of bipolar type I disorder. The diagnosis was assessed with a structured research interview, and the study subjects (n = 67) filled in the Seasonal Pattern Assessment Questionnaire (SPAQ) and the Morningness-Eveningness Questionnaire (MEQ). For studying the persistence of the habitual sleep length and circadian type, we used data derived from the Finnish Twin Cohort Questionnaire (FTCQ). Bipolar twins were compared with their healthy co-twins. RESULTS: Bipolar twins had greater seasonal changes in sleep length (p = 0.01) and mood (p = 0.01), and higher global seasonality scores (p = 0.03) as compared with their co-twins with no mental disorder. Sunny days (p = 0.03) had a greater positive effect on wellbeing in the bipolar than healthy co-twins. CONCLUSIONS: Our results support the view that bipolar disorder is sensitive to the environmental influence in general and to the seasonal effect in specific. Exposure to natural light appears to have a substantial effect on wellbeing in twins with bipolar disorder.},
affiliation = {Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland. reeta.hakkarainen@ktl.fi},
pages = {6},
volume = {3},
year = {2003},
month = {Jun},
language = {eng},
keywords = {Seasons, Photoperiod, Weather, Adult, Sleep, Light, Twins: Dizygotic, Circadian Rhythm, Humans, Male, Bipolar Disorder, Twins: Monozygotic, Female, Diseases in Twins},
date-added = {2010-03-20 19:37:37 +0100},
date-modified = {2010-03-20 19:37:37 +0100},
doi = {10.1186/1471-244X-3-6},
pmid = {12795811},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Hakkarainen-2003-BMC%20Psychiatry_Seasonal%20changes%20sl.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p8022},
rating = {0}
}

@article{Punj:1983p13483,
author = {G Punj and D W Stewart},
journal = {Journal of Marketing Research},
title = {Cluster Analysis in marketing research: Review and suggestions for application},
pages = {134--148},
volume = {XX},
year = {1983},
date-added = {2010-07-01 22:15:06 +0200},
date-modified = {2010-07-29 19:34:53 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Punj-1983-Journal%20of%20Marketing%20Research_Cluster%20Analysis%20in.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p13483},
rating = {0}
}

@article{Asparouhov:2010p10381,
author = {T Asparouhov and B Muth{\'e}n},
title = {Exploratory Structural Equation Modeling},
abstract = {Exploratory factor analysis (EFA) is a frequently used multivariate analysis tech- nique in statistics. Jennrich and Sampson (1966) solved a significant EFA factor load- ing matrix rotation problem by deriving the direct Quartimin rotation. Jennrich was also the first to develop standard errors for rotated solutions although these have still not made their way into most statistical software programs. This is perhaps because Jennrichs achievements were partly overshadowed by the subsequent development of confirmatory factor analysis (CFA) by Joreskog (1969). The strict requirement of zero cross-loadings in CFA, however, often does not fit the data well and has led to a tendency to rely on extensive model modification to find a well-fitting model. In such cases, searching for a well-fitting measurement model may be better carried out by EFA (Browne, 2001). Furthermore, misspecification of zero loadings usually leads to distorted factors with over-estimated factor correlations and subsequent distorted structural relations. This paper describes an EFA-SEM (ESEM) approach, where in addition to or instead of a CFA measurement model, an EFA measurement model with rotations can be used in a structural equation model. The ESEM approach has recently been implemented in the Mplus program. ESEM gives access to all the usual SEM pa- rameter and the loading rotation gives a transformation of structural coefficients as well. Standard errors and overall tests of model fit are obtained. Geomin and Target rotations are discussed. Examples of ESEM models include multiple-group EFA with measurement and structural invariance testing, test-retest (longitudinal) EFA, EFA with covariates and direct effects, and EFA with correlated residuals. Testing strate- gies with sequences of EFA and CFA models are discussed. Simulated and real data are used to illustrate the points.},
date-added = {2010-04-02 18:21:33 +0200},
date-modified = {2010-04-02 18:22:20 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Asparouhov--_Exploratory%20Structur.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p10381},
rating = {0}
}

@article{Matte:2001p5010,
author = {T D Matte and M Bresnahan and M D Begg and E Susser},
journal = {BMJ},
title = {Influence of variation in birth weight within normal range and within sibships on IQ at age 7 years: cohort study},
abstract = {OBJECTIVE: To examine the relation between birth weight and measured intelligence at age 7 years in children within the normal range of birth weight and in siblings. DESIGN: Cohort study of siblings of the same sex. SETTING: 12 cities in the United States. SUBJECTS: 3484 children of 1683 mothers in a birth cohort study during the years 1959 through 1966. The sample was restricted to children born at >/=37 weeks gestation and with birth weights of 1500-3999 g. MAIN OUTCOME MEASURE: Full scale IQ at age 7 years. RESULTS: Mean IQ increased monotonically with birth weight in both sexes across the range of birth weight in a linear regression analysis of one randomly selected sibling per family (n= 1683) with adjustment for maternal age, race, education, socioeconomic status, and birth order. Within same sex sibling pairs, differences in birth weight were directly associated with differences in IQ in boys (812 pairs, predicted IQ difference per 100 g change in birth weight =0.50, 95% confidence interval 0.28 to 0.71) but not girls (871 pairs, 0.10, -0.09 to 0.30). The effect in boys remained after differences in birth order, maternal smoking, and head circumference were adjusted for and in an analysis restricted to children with birth weight >/= 2500 g. CONCLUSION: The increase in childhood IQ with birth weight continues well into the normal birth weight range. For boys this relation holds within same sex sibships and therefore cannot be explained by confounding from family social environment.},
affiliation = {Center for Urban Epidemiologic Studies, New York Academy of Medicine, 1216 Fifth Avenue, New York, NY 10029, USA. tmatte@nyam.org},
number = {7308},
pages = {310--4},
volume = {323},
year = {2001},
month = {Aug},
language = {eng},
keywords = {Humans, Female, United States, Male, Intelligence Tests, Cohort Studies, Birth Weight, Infant: Newborn, Child, Linear Models, Intelligence},
date-added = {2010-02-05 19:56:06 +0100},
date-modified = {2010-02-05 19:56:06 +0100},
pmid = {11498487},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Matte-2001-BMJ_Influence%20of%20variati.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p5010},
rating = {0}
}

@article{Rhee:2003p9529,
author = {Soo Hyun Rhee and John K Hewitt and Susan E Young and Robin P Corley and Thomas J Crowley and Michael C Stallings},
journal = {Arch Gen Psychiatry},
title = {Genetic and environmental influences on substance initiation, use, and problem use in adolescents},
abstract = {BACKGROUND: We conducted a sibling/twin/adoption study of substance initiation, use, and problem use, estimating the relative contribution of genetic and environmental influences on these phenotypes in adolescents. METHODS: The participants were 345 monozygotic twin pairs, 337 dizygotic twin pairs, 306 biological sibling pairs, and 74 adoptive sibling pairs assessed by the Colorado Center for the Genetics and Treatment of Antisocial Drug Dependence, Denver and Boulder. The initiation, use, and problem use of tobacco, alcohol, marijuana, and other illicit drugs were assessed. Tetrachoric correlations were computed for each group, and univariate model-fitting analyses were conducted. RESULTS: There were moderate to substantial genetic influences, with the exception of alcohol use and any drug use, and modest to moderate shared environmental influences on substance initiation, use, and problem use. For alcohol and any drug, heritability was higher and the magnitude of shared environmental influences was lower for problem use than for initiation or use. Environmental influences shared only by twin pairs had a significant effect on tobacco initiation, alcohol use, and any drug use. For tobacco use, tobacco problem use, and marijuana initiation, heritability was higher and the magnitude of shared environmental influences was lower in female than in male adolescents. There was no evidence for sex-specific genetic or shared environmental influences on any variable. CONCLUSIONS: The moderate to substantial heritabilities found for adolescents in the present study are comparable to those found in twin studies of adult substance use and substance use disorders. The finding that problem use is more heritable than initiation and use is also consistent with the results of adult twin studies. The significance of environmental influences shared only by twin pairs on tobacco initiation, alcohol use, and any drug use suggests the influences of peers, accessibility of substances, and sibling interaction.},
affiliation = {Department of Psychology and the Institute for Behavioral Genetics, University of Colorado at Boulder, 90309, USA. soo.rhee@colorado.edu},
number = {12},
pages = {1256--64},
volume = {60},
year = {2003},
month = {Dec},
language = {eng},
keywords = {Female, Sex Factors, Substance-Related Disorders, Twins: Monozygotic, Phenotype, Adoption, Alcoholism, Genetic Predisposition to Disease, Humans, Male, Twins: Dizygotic, Diseases in Twins, Adolescent, Social Environment, Siblings, Risk Factors},
date-added = {2010-03-23 19:44:08 +0100},
date-modified = {2010-03-23 20:28:05 +0100},
doi = {10.1001/archpsyc.60.12.1256},
pii = {60/12/1256},
pmid = {14662558},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Rhee-2003-Arch%20Gen%20Psychiatry_Genetic%20and%20environm.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p9529},
rating = {3}
}

@article{Broer:2005p3686,
author = {M Broer and Y W Lee and S Rizavi and D Powers},
title = {Ensuring the Fairness of GRE Writing Prompts: Assessing Differential Difficulty},
year = {2005},
date-added = {2010-01-16 20:26:21 +0100},
date-modified = {2010-01-16 20:27:03 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Broer-2005-_Ensuring%20the%20Fairnes.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p3686},
rating = {0}
}

@article{Gatti:2005p7677,
author = {Ileana Gatti and Fernando L{\'o}pez Anido and Vanina Cravero and Pablo Asprelli and Enrique Cointry},
journal = {Genet Mol Res},
title = {Heritability and expected selection response for yield traits in blanched asparagus},
abstract = {Despite the continuous breeding that has been conducted with asparagus (Asparagus officinalis L.) since the beginning of the last century, there is little information on parameters for predicting direct and indirect selection response. Yield traits for blanched asparagus production were studied along a two-year period in a half-sib family population planted in Zavalla, Argentina. Half-sib family mean heritability values were low for total yield and marketable spear number (0.31 and 0.35), intermediate for marketable yield and total spear number (0.55 and 0.64), and relatively high for spear diameter and spear weight (0.75 and 0.74). An average increase in marketable yield of 15.9% is expected after each cycle of selection of the top 5% of the families. Total yield failed to express significant genetic correlations with any of the yield components; meanwhile marketable yield showed highly significant relations with market spear number (0.96) and spear weight (0.89). Indirect selection response over yield components (CRx) failed to be advantageous over direct selection (Rx), since the ratio CRx/Rx was always equal or below unity.},
affiliation = {Conicet, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina.},
number = {1},
pages = {67--73},
volume = {4},
year = {2005},
month = {Jan},
language = {eng},
keywords = {Models: Genetic, Asparagus Plant, Selection: Genetic, Phenotype, Breeding, Quantitative Trait: Heritable},
date-added = {2010-03-15 23:48:44 +0100},
date-modified = {2010-03-15 23:48:44 +0100},
pii = {0085},
pmid = {15841437},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Gatti-2005-Genet%20Mol%20Res_Heritability%20and%20exp.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p7677},
rating = {0}
}

@article{Bechger:2000aa,
author = {Timo M Bechger and Huub H F M Verstralen and Norman D Verhelst},
title = {Equivalent Linear Logistic Test Models},
abstract = {This paper is about the Linear Logistic Test Model (LLTM). We demonstrate that there are infinitely many equivalent ways to specify a model . An implication is that there may well be many ways to change the specification of a given LLTM and achieve the same improvement in model fit. To illustrate this phenomenon we analyze a real data set us ing a Lagrange multiplier test for the specification of the model.},
year = {2000},
month = {Aug},
date-added = {2010-01-03 19:39:02 +0100},
date-modified = {2010-01-03 19:39:03 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Bechger-2000-_Equivalent%20Linear%20Lo.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1198},
rating = {0}
}

@article{Lachenbruch:2010p13657,
author = {Peter A Lachenbruch},
journal = {Stat Methods Med Res},
title = {Variable selection when missing values are present: a case study},
abstract = {We consider variable selection when missing values are present in the predictor variables. We compare using complete cases with multiple imputation using backward selection (backwards stepping) and least angle regression. These are studied using a data set from a rheumatological disease (myositis). We find that the coefficients are slightly different and the estimated standard errors are smaller in the complete cases (not a surprise). This seems to be due to the fact that because the estimated residual variance is small the complete cases are more homogeneous than the full data cases.},
affiliation = {Department of Public Health, Oregon State University, Corvallis, OR, USA.},
pages = {},
year = {2010},
month = {May},
language = {ENG},
date-added = {2010-07-11 09:02:56 +0200},
date-modified = {2010-07-11 09:02:56 +0200},
doi = {10.1177/0962280209358003},
pii = {0962280209358003},
pmid = {20442196},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Lachenbruch-2010-Stat%20Methods%20Med%20Res_Variable%20selection%20w.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p13657},
rating = {0}
}

@article{Borg:2008p8876,
author = {Jacqueline Borg},
journal = {Behav Brain Res},
title = {Molecular imaging of the 5-HT(1A) receptor in relation to human cognition},
abstract = {Animal studies and pharmacological studies in man have suggested that the serotonin 5-HT(1A) receptor may serve as a biomarker for cognitive functioning and a target for treatment of cognitive impairment. Consistent findings in man have nonetheless hitherto remained sparse. Positron emission tomography (PET) imaging of the 5-HT(1A) receptor in patients with Alzheimer's disease, schizophrenia and depression implicate an alteration in 5-HT(1A) receptor binding compared to control subjects, but it is yet unknown whether these alterations are related to the cognitive impairment associated with these disorders. Pharmacological challenge studies using 5-HT(1A) agonism and antagonism to manipulate the serotonin system support involvement of the 5-HT(1A) receptor in human cognition, mainly in verbal memory functioning. However, the effect varies across studies and it remains unclear if the 5-HT(1A) receptor serves as a validated target for treatment of cognitive deficits. This lack of confirmation of experimental preclinical data, calls for increased efforts in translational research. Molecular imaging techniques such as PET, holds the potential to facilitate translational neuroscience by confirming observations from animal models in man, and aid development of validated animal models of use for advancement of pharmacological treatment. Furthermore, in combination with molecular genetics, molecular imaging may suggest novel strategies for prevention and intervention, based on an understanding of the molecular mechanisms involved in disease pathogenesis of major neuropsychiatric disorder and associated cognitive impairment.},
affiliation = {Karolinska Institute, Department of Clinical Neuroscience and Stockholm Brain Institute, Section of Psychiatry, 17176 Stockholm, Sweden. jacqueline.borg@ki.se},
number = {1},
pages = {103--11},
volume = {195},
year = {2008},
month = {Dec},
language = {eng},
keywords = {Alzheimer Disease, Schizophrenia, Cognition Disorders, Brain, Receptor: Serotonin: 5-HT1A, Mood Disorders, Cognition, Positron-Emission Tomography, Humans},
date-added = {2010-03-22 12:44:06 +0100},
date-modified = {2010-07-29 19:18:59 +0200},
doi = {10.1016/j.bbr.2008.06.011},
pii = {S0166-4328(08)00304-5},
pmid = {18606193},
URL = {http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6SYP-4SSG4PH-2&_user=2432700&_coverDate=12%252F16%252F2008&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000057263&_version=1&_urlVersion=0&_userid=2432700&md5=692058bde132c46e3bb6ec99c985d2f4},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Borg-2008-Behav%20Brain%20Res_Molecular%20imaging%20of.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p8876},
rating = {0}
}

@article{Gadow:2009p1238,
author = {Kenneth D Gadow and Jasmin Roohi and Carla J DeVincent and Sarah Kirsch and Eli Hatchwell},
journal = {J Autism Dev Disord},
title = {Association of COMT (Val158Met) and BDNF (Val66Met) gene polymorphisms with anxiety, ADHD and tics in children with autism spectrum disorder},
abstract = {The aim of the study is to examine rs4680 (COMT) and rs6265 (BDNF) as genetic markers of anxiety, ADHD, and tics. Parents and teachers completed a DSM-IV-referenced rating scale for a total sample of 67 children with autism spectrum disorder (ASD). Both COMT (p = 0.06) and BDNF (p = 0.07) genotypes were marginally significant for teacher ratings of social phobia (etap (2) = 0.06). Analyses also indicated associations of BDNF genotype with parent-rated ADHD (p = 0.01, etap (2) = 0.10) and teacher-rated tics (p = 0.04; etap (2) = 0.07). There was also evidence of a possible interaction (p = 0.02, etap (2) = 0.09) of BDNF genotype with DAT1 3' VNTR with tic severity. BDNF and COMT may be biomarkers for phenotypic variation in ASD, but these preliminary findings remain tentative pending replication with larger, independent samples.},
affiliation = {Department of Psychiatry and Behavioral Science, State University of New York, Putnam Hall, South Campus, Stony Brook, NY 11794-8790, USA. kenneth.gadow@stonybrook.edu},
number = {11},
pages = {1542--51},
volume = {39},
year = {2009},
month = {Nov},
language = {eng},
keywords = {Genetic Association Studies, Anxiety, Male, Humans, Female, Child Development Disorders: Pervasive, Polymerase Chain Reaction, Attention Deficit Disorder with Hyperactivity, Catechol O-Methyltransferase, Brain-Derived Neurotrophic Factor, Child, Polymorphism: Single Nucleotide, Tics, Genotype, Genetic Markers},
date-added = {2010-01-07 11:23:29 +0100},
date-modified = {2010-01-07 11:23:29 +0100},
doi = {10.1007/s10803-009-0794-4},
pmid = {19582565},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1238},
rating = {0}
}

@article{Rutherford:2008p6050,
author = {M D Rutherford and Ashley M Towns},
journal = {J Autism Dev Disord},
title = {Scan path differences and similarities during emotion perception in those with and without autism spectrum disorders},
abstract = {Typical adults use predictable scan patterns while observing faces. Some research suggests that people with autism spectrum disorders (ASD) instead attend to eyes less, and perhaps to the mouth more. The current experiment was designed as a direct measure of scan paths that people with and without ASD use when identifying simple and complex emotions. Participants saw photos of emotions and chose emotion labels. Scan paths were measured via infrared corneal reflectance. Both groups looked significantly longer at eyes than mouth, and neither overall looking time at eyes nor first fixations distinguished the groups. These results are contrary to suggestions that those with ASD attend preferentially to the mouth and avoid the eyes. Furthermore, there was no interaction between group and area of the face: the ratio of attention between eyes and mouth did not differ between the ASD and control groups. However, those with ASD looked at the eyes less than the control group when viewing complex emotions.},
affiliation = {Department of Psychology, Neuroscience and Behaviour, McMaster University, 1280 Main Street West, Hamilton, ON, Canada, L8S 4K1. rutherm@mcmaster.ca},
number = {7},
pages = {1371--81},
volume = {38},
year = {2008},
month = {Aug},
language = {eng},
keywords = {Autistic Disorder, Attention, Male, Young Adult, Fixation: Ocular, Adult, Female, Pattern Recognition: Visual, Eye Movements, Facial Expression, Humans, Emotions, Reference Values},
date-added = {2010-02-19 17:01:34 +0100},
date-modified = {2010-02-19 17:01:34 +0100},
doi = {10.1007/s10803-007-0525-7},
pmid = {18297386},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p6050},
rating = {0}
}

@techreport{Robson:2001,
author = {L S Robson and H S Shannon and L M Goldenhar and A R Hale},
journal = {Techreport},
title = {Guide to Evaluating the Effectiveness of Strategies for Preventing Work Injuries: How to Show Whether a Safety Intervention Really Works},
affiliation = {DEPARTMENT OF HEALTH AND HUMAN SERVICES},
year = {2001},
month = {Apr},
date-added = {2010-01-10 11:33:17 +0100},
date-modified = {2010-01-10 11:33:25 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Robson-2001-Techreport_Guide%20to%20Evaluating.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2003},
rating = {0}
}

@article{Nicodemus:2004p5840,
author = {Kristin K Nicodemus and Judith E Stenger and Donald E Schmechel and Kathleen A Welsh-Bohmer and Ann M Saunders and Allen D Roses and John R Gilbert and Jeffery M Vance and Jonathan L Haines and Margaret A Pericak-Vance and Eden R Martin},
journal = {Neurogenetics},
title = {Comprehensive association analysis of APOE regulatory region polymorphisms in Alzheimer disease},
abstract = {Several recent case-control studies have examined the association between single nucleotide polymorphisms (SNPs) in the promoter region of the apolipoprotein E gene (APOE) and risk of Alzheimer disease (AD), with conflicting results. We assessed the relation between five APOE region SNPs and risk of AD in both case-control and family-based analyses. We observed a statistically significant association with the +5361T allele in the overall case-control analysis (P value=0.04) after adjusting for the known effect of the APOE-4 allele. Further analysis revealed this association to be limited to carriers of the APOE-4 allele. Age-stratified analyses in the patients with age at onset of 80 years or greater and age-matched controls showed that the -219T allele (P value=0.009) and the +113C allele (P value=0.03) are associated with increased risk of AD. Despite these findings, haplotype and family-based association analyses were unable to provide evidence that the APOE region SNPs influenced risk of AD independent of the APOE-4 allele. In addition to risk, we tested for association between the SNPs and age at onset of AD, but found no association in the case-control or family based analyses. In conclusion, SNPs +5361, or a SNP in strong linkage disequilibrium, may confer some additional risk for developing AD beyond the risk due to APOE-4; however, the effect independent of APOE-4 is likely to be small.},
affiliation = {Department of Medicine and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina 27710, USA.},
number = {4},
pages = {201--8},
volume = {5},
year = {2004},
month = {Dec},
language = {eng},
keywords = {Apolipoproteins E, Polymorphism: Genetic, Aged: 80 and over, Case-Control Studies, Alzheimer Disease, Risk Factors, Age of Onset, Aged, Apolipoprotein E4, Female, Genetic Predisposition to Disease, Family Health, Humans, Haplotypes, Linkage Disequilibrium, Male},
date-added = {2010-02-17 10:14:38 +0100},
date-modified = {2010-02-17 10:14:38 +0100},
doi = {10.1007/s10048-004-0189-9},
pmid = {15455263},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Nicodemus-2004-Neurogenetics_Comprehensive%20associ.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p5840},
rating = {0}
}

@article{Bechger:2000p14011,
author = {Timo M Bechger and Huub H F M Verstralen and Norman D Verhelst},
title = {Equivalent Linear Logistic Test Models},
abstract = {This paper is about the Linear Logistic Test Model (LLTM). We demonstrate that there are in...nitely many equivalent ways to specify a model. An impli- cation is that there may well be many ways to change the speci...cation of a given LLTM and achieve the same improvement in model ...t. To illustrate this phenomenon we analyze a real data set using a Lagrange multiplier test for the speci...cation of the model.},
year = {2000},
date-added = {2010-08-04 09:36:30 +0200},
date-modified = {2010-08-04 09:37:17 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Bechger-2000-_Equivalent%20Linear%20Lo-1.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p14011},
rating = {0}
}

@article{Arvola:2008p7225,
author = {A Arvola and M Vassallo and M Dean and P Lampila and A Saba and L L{\"a}hteenm{\"a}ki and R Shepherd},
journal = {Appetite},
title = {Predicting intentions to purchase organic food: the role of affective and moral attitudes in the Theory of Planned Behaviour},
abstract = {This study examined the usefulness of integrating measures of affective and moral attitudes into the Theory of Planned Behaviour (TPB)-model in predicting purchase intentions of organic foods. Moral attitude was operationalised as positive self-rewarding feelings of doing the right thing. Questionnaire data were gathered in three countries: Italy (N=202), Finland (N=270) and UK (N=200) in March 2004. Questions focussed on intentions to purchase organic apples and organic ready-to-cook pizza instead of their conventional alternatives. Data were analysed using Structural Equation Modelling by simultaneous multi-group analysis of the three countries. Along with attitudes, moral attitude and subjective norms explained considerable shares of variances in intentions. The relative influences of these variables varied between the countries, such that in the UK and Italy moral attitude rather than subjective norms had stronger explanatory power. In Finland it was other way around. Inclusion of moral attitude improved the model fit and predictive ability of the model, although only marginally in Finland. Thus the results partially support the usefulness of incorporating moral measures as well as affective items for attitude into the framework of TPB.},
affiliation = {VTT Biotechnology, Consumer Science, PO Box 1000, 02044 VTT, Finland. anne.arvola@vtt.fi},
number = {2-3},
pages = {443--54},
volume = {50},
year = {2008},
month = {Jan},
language = {eng},
keywords = {Health Knowledge: Attitudes: Practice, Commerce, Italy, Questionnaires, Morals, Cross-Cultural Comparison, Health Food, Agriculture, Attitude, Finland, Health Behavior, Choice Behavior, Female, Humans, Food Preferences, Great Britain, Social Behavior, Male, Psychological Theory, Predictive Value of Tests, Adult, Factor Analysis: Statistical},
date-added = {2010-03-08 19:32:58 +0100},
date-modified = {2010-07-29 19:15:30 +0200},
doi = {10.1016/j.appet.2007.09.010},
pii = {S0195-6663(07)00372-8},
pmid = {18036702},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p7225},
rating = {0}
}

@article{Khoury:2004p9316,
author = {Muin J Khoury and Robert Millikan and Julian Little and Marta Gwinn},
journal = {Int J Epidemiol},
title = {The emergence of epidemiology in the genomics age},
affiliation = {Office of Genomics and Disease Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. mkhoury@cdc.gov},
number = {5},
pages = {936--44},
volume = {33},
year = {2004},
month = {Oct},
language = {eng},
keywords = {Research Design, Molecular Epidemiology, Genomics, Genome: Human, Epidemiologic Methods, Genetics: Population, Humans},
date-added = {2010-03-22 13:43:15 +0100},
date-modified = {2010-03-22 13:43:15 +0100},
doi = {10.1093/ije/dyh278},
pii = {dyh278},
pmid = {15319400},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Khoury-2004-Int%20J%20Epidemiol_The%20emergence%20of%20epi.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p9316},
rating = {0}
}

@article{Rietveld:2003p1354,
author = {M J H Rietveld and J J Hudziak and M Bartels and C E M van Beijsterveldt and Dorret I Boomsma},
journal = {Am J Med Genet B Neuropsychiatr Genet},
title = {Heritability of attention problems in children: I. cross-sectional results from a study of twins, age 3-12 years},
abstract = {Multiple twin studies of attention problems (AP) from the Child Behavior Checklist or ADHD from the DSM criteria have reported on the genetic and environmental influences on these behaviors. The majority of these have studied AP and ADHD symptoms in twin samples combined across wide age spans, combined rater information and both genders. Thus, it is possible that the results are complicated by developmental, informant, and gender differences. The purpose of this study was to assess for the genetic and environmental contributions to overactive behavior (a syndrome highly related to AP in 7-, 10-, and 12-years olds) in 3-years olds (3,671 twin pairs), and attention problems in 7- (3,373 twin pairs), 10- (2,485 twin pairs), and 12-years olds (1,305 twin pairs) while controlling for developmental, gender and rater contrast contributions. Using a cross-sectional twin design, contributions from genetic additive, genetic dominance, unique environmental and rater contrast effects were estimated for CBCL maternal reports. We found that genetic influences on overactive behavior and attention problems are high across an age span that covers pre-school and elementary school age. Although girls display less problem behavior compared to boys, heritability estimates were found equal for both genders at each age. Environmental experiences that are unique to the individual accounted for the remaining influence. At the age of 3 years, a rater contrast effect was detected. We hypothesize that the contrast effect represents a maternal rater bias effect that is dependent on the age of the twins. The implications of these findings are discussed with reference to the clinical setting and in the context of future research.},
affiliation = {Department of Biological Psychology, Vrije Universiteit, Amsterdam, The Netherlands. mjh.rietveld@psy.vu.nl},
number = {1},
pages = {102--13},
volume = {117B},
year = {2003},
month = {Feb},
language = {eng},
keywords = {Male, Twin Studies as Topic, Models: Genetic, Family Health, Mothers, Twins, Female, Age Factors, Attention Deficit Disorder with Hyperactivity, Child: Preschool, Cross-Sectional Studies, Sex Factors, Child, Humans, Questionnaires},
date-added = {2010-01-07 11:40:11 +0100},
date-modified = {2010-07-29 20:25:51 +0200},
doi = {10.1002/ajmg.b.10024},
pmid = {12555244},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Rietveld-2003-Am%20J%20Med%20Genet%20B%20Neuropsychiatr%20Genet_Heritability%20of%20atte.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1354},
rating = {0}
}

@article{Lees:2007p11171,
author = {J A Lees},
title = {Differential item functioning analysis of the Herrmann brain dominance instrument},
year = {2007},
date-added = {2010-04-25 21:18:49 +0200},
date-modified = {2010-07-11 09:53:58 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Lees-2007-_Differential%20item%20fu-1.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p11171},
read = {Yes},
rating = {0}
}

@article{Gleason:2008,
author = {J Gleason},
journal = {Notices of the AMS},
title = {An Evaluation of Mathematics Competitions Using Item Response Theory},
number = {1},
pages = {8--15},
volume = {55},
year = {2008},
date-added = {2010-01-10 11:33:09 +0100},
date-modified = {2010-01-10 11:33:25 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Gleason-2008-Notices%20of%20the%20AMS_An%20Evaluation%20of%20Mat.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2179},
rating = {0}
}

@article{Fletcher:2006p1669,
author = {T D Fletcher},
title = {Methods and Approaches to Assessing Distal Mediation},
abstract = {This paper briefly reviews the concept of mediation. The basic mediation model, as tested with the indirect effect or product of paths approach is extended to include multiple mediators in a causal chain (X ␣ M1 ␣ M2 ␣ Y). The concept of distal mediation is explained and examined with regression, structural equation modeling and bootstrapping. It is shown through the use of the bootstrap technique that the sampling distribution of the indirect effect is non-normal creating asymmetrical confidence intervals about the estimate. A hypothetical example of distal mediation is used to illustrate the concepts.},
year = {2006},
keywords = {Mediation, bootstrapping, indirect effect},
date-added = {2010-01-08 22:13:08 +0100},
date-modified = {2010-01-08 22:14:29 +0100},
URL = {http://www.umsl.edu/~fletchert},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Fletcher-2006-_Methods%20and%20Approach.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1669},
rating = {0}
}

@article{Goldberg:2001p10348,
author = {D Goldberg},
journal = {Br J Psychiatry Suppl},
title = {Vulnerability factors for common mental illnesses},
abstract = {BACKGROUND: Twin studies suggest that shared early family environment is of only minor importance in the aetiology of depression, most of the variance being attributable either to genetic or to individual 'non-shared' environmental factors. AIMS: To examine the respective roles of personality and social experiences on the risk for common mental disorders, with special reference to depression. METHOD: Analysis of preliminary findings from two large-scale British population surveys: (a) a multi-centre study of general practice patients, and (b) a study of working-class women in Manchester. RESULTS: (a) Persons recently separated from their partners have raised mean scores for psychological distress, but the relative excess is due entirely to persons with high ratings for introversion; (b) while severe life events were associated with physiological responses characteristic of depression, the probability of experiencing such life events varied between 0.2 monthly for low scorers and 1.5 monthly for high scorers on a vulnerability measure. CONCLUSIONS: Social factors do appear to influence the prevalence of depression, but this effect is not independent of genetically determined vulnerability.},
affiliation = {Institute of Psychiatry, De Crespigny Park, London SE5 8AF, UK.},
pages = {s69--71},
volume = {40},
year = {2001},
month = {Apr},
language = {eng},
keywords = {Adult, Humans, Prevalence, Introversion (Psychology), Social Class, Life Change Events, England, Child, Child: Preschool, Risk Factors, Depressive Disorder, Social Environment, Personality Disorders, Twin Studies as Topic, Female, Multicenter Studies as Topic},
date-added = {2010-04-02 18:18:27 +0200},
date-modified = {2010-04-02 18:18:32 +0200},
pmid = {11315228},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Goldberg-2001-Br%20J%20Psychiatry%20Suppl_Vulnerability%20factor.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p10348},
rating = {4}
}

@article{Chochinov:2006p13123,
author = {Harvey Max Chochinov and Linda J Kristjanson and Thomas F Hack and Thomas Hassard and Susan McClement and Mike Harlos},
journal = {J Pain Symptom Manage},
title = {Personality, neuroticism, and coping towards the end of life},
abstract = {The influence of personality characteristics on how patients cope with various challenges at the end of life has not been extensively studied. In order to examine the association between end-of-life experience and neuroticism (defined within the personality literature as a trait tendency to experience psychological distress), a measure of neuroticism was administered to a cohort of dying cancer patients. Various other measures of physical, psychological, and existential distress were also measured to explore their possible connection to patient personality style. The personality characteristic neuroticism demonstrated a significant relationship with several end-of-life sources of distress, including depression, anxiety, sense of dignity, quality of life (rating and satisfaction), hopelessness, concentration, and outlook on the future. Neuroticism appears to have a significant association with the dying experience. This association is expressed across the psychological, existential and, to a lesser extent, physical and social domains of end-of-life distress. This may help clinicians identify vulnerable individuals who are most likely to have poorer adjustments and may benefit from earlier targeted interventional approaches. Exploring the relationship between various facets of personality and end-of-life distress, and mapping this information against optimal therapeutic responses, remains the challenge for future research broaching this intriguing and largely ignored area of palliative care.},
affiliation = {Department of Psychiatry, University of Manitoba, Winnipeg, Manitoba, Canada. harvey.chochinov@cancercare.mb.ca},
number = {4},
pages = {332--41},
volume = {32},
year = {2006},
month = {Oct},
language = {eng},
keywords = {Aged, Personality, Manitoba, Adaptation: Psychological, Female, Risk Assessment, Male, Neoplasms, Neurotic Disorders, Humans, Terminally Ill},
date-added = {2010-06-26 10:48:52 +0200},
date-modified = {2010-06-26 10:48:52 +0200},
doi = {10.1016/j.jpainsymman.2006.05.011},
pii = {S0885-3924(06)00442-8},
pmid = {17000350},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Chochinov-2006-J%20Pain%20Symptom%20Manage_Personality%20neuroti.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p13123},
rating = {0}
}

@article{Ernst:2009p4763,
author = {Monique Ernst and Russell D Romeo and Susan L Andersen},
journal = {Pharmacol Biochem Behav},
title = {Neurobiology of the development of motivated behaviors in adolescence: a window into a neural systems model},
abstract = {Adaptive motivated behaviors are at the core of a successful life. Conversely, perturbed motivated behaviors are the hallmark of psychiatric disorders. Based on the notion that most psychopathology is developmental in nature, understanding the neural mechanisms that control motivated behavior across development and in psychopathology is a critical step for preventing and treating psychiatric diseases. This review focuses on adolescence, which is the critical developmental period that determines the successful passage into adulthood. We first present a heuristic neural systems model of motivated behavior (triadic model) that integrates neuroscience theories and the emerging body of functional neuroimaging work on the neurodevelopment of motivated behavior. As a key feature of adolescence, social reorientation is particularly emphasized through the presentation of a parallel model of social integration processing network. Although not yet integrated in the triadic model, pubertal changes and their possible contribution to adolescent motivated behavior are reviewed. Similarly, given its central role in motivated actions, the dopamine system is discussed from the perspective of animal studies dedicated to changes of this system across adolescence. This review reveals vast gaps in knowledge about the neurobiology of motivated behavior in normally developing individuals, which makes the translation to psychopathology only tentative. However, it provides clear directions for future research.},
affiliation = {Mood and Anxiety Disorders Program, National Institute of Mental Health, National Institutes of Health, 15K North Drive, Bethesda MD 10892, United States. ernstm@mail.nih.gov},
number = {3},
pages = {199--211},
volume = {93},
year = {2009},
month = {Sep},
language = {eng},
keywords = {Adolescent Psychology, Adolescent, Dopamine, Nervous System, Humans, Social Environment, Nervous System Physiological Phenomena, Hormones, Motivation, Brain Chemistry},
date-added = {2010-02-01 20:19:28 +0100},
date-modified = {2010-07-29 19:43:18 +0200},
doi = {10.1016/j.pbb.2008.12.013},
pii = {S0091-3057(08)00404-8},
pmid = {19136024},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Ernst-2009-Pharmacol%20Biochem%20Behav_Neurobiology%20of%20the.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p4763},
rating = {0}
}

@article{Bishop:1999p7363,
author = {S L Bishop and D P Walling and S G Dott and C C Folkes and J Bucy},
journal = {Qual Life Res},
title = {Refining quality of life: validating a multidimensional factor measure in the severe mentally ill},
abstract = {Quality of life measurement has historically been characterized by a focus on physical functionality, great variability in definitions and insufficient attention to psychometric properties of measures. The present study examined four core subscales of the Quality of Life Enjoyment Scale (Q-LES-Q) designed to assess subjective quality of life (i.e. physical health, subjective feelings, leisure activities and social relationships) administered to 151 male and female subjects with severe mental illness admitted to a residential community treatment center or a university psychiatric hospital. The use of factor analysis is a common approach to examining construct validity of instruments through the examination of correlated clusters of item responses. Those sets of highly correlated item responses should identify a construct or dimension of related items (i.e. a factor). Two factor approaches, exploratory (i.e. the maximum number of possible factor is unspecified) and restricted (i.e. the maximum number of factors allowed is specified), were employed to examine construct validity of the four Q-LES-Q subscales. In addition, both orthogonal (i.e. independence between factors is maximized) and oblique (i.e. correlated factors are allowed) rotations (arrangements) of factor structure were also investigated to define subscale validity further. Results supported good construct validity for each subscale with either factor approach, i.e. the four proposed subscales were clearly identifiable in the factors (groupings) of correlated item responses from the sample. In both cases, the orthogonal (independent) rotation produced the simplest structure, i.e. the clearest groupings of items. These results indicate that the Q-LES-Q does appear to measure valid dimensions matching those proposed by the subscales and, thus, may be a useful and reliable tool for clinical applications.},
affiliation = {University of Texas Medical Branch, Galveston 77555, USA. SBishop@utmb.edu},
number = {1-2},
pages = {151--60},
volume = {8},
year = {1999},
month = {Jan},
language = {eng},
keywords = {Severity of Illness Index, Quality of Life, Questionnaires, Mental Health, Mental Disorders, Activities of Daily Living, Female, Reproducibility of Results, Adult, Humans, Health Status, Adolescent, Male, Social Behavior, Factor Analysis: Statistical, Cluster Analysis, Middle Aged, Aged, Psychometrics},
date-added = {2010-03-10 20:29:42 +0100},
date-modified = {2010-07-29 19:48:29 +0200},
pmid = {10457748},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p7363},
rating = {0}
}

@article{Wolfinger:2010p4615,
author = {R D Wolfinger},
title = {Fitting Nonlinear Mixed Models with the New NLMIXED Procedure},
abstract = {Statistical models in which both fixed and random effects enter nonlinearly are becoming increasingly popular. These models have a wide variety of applications, two of the most common being nonlinear growth curves and overdispersed binomial data. A new SAS/STAT{\textregistered} procedure, NLMIXED, fits these models using likelihood-based methods. This paper presents some of the primary features of PROC NLMIXED and illustrates its use with two examples.},
affiliation = {SAS Institute Inc., Cary, NC},
date-added = {2010-01-30 15:17:35 +0100},
date-modified = {2010-01-30 15:18:17 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Wolfinger--_Fitting%20Nonlinear%20Mi.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p4615},
rating = {0}
}

@article{Hernan:2006p4879,
author = {Miguel A Hern{\'a}n and Emilie Lanoy and Dominique Costagliola and James M Robins},
journal = {Basic Clin Pharmacol Toxicol},
title = {Comparison of dynamic treatment regimes via inverse probability weighting},
abstract = {Appropriate analysis of observational data is our best chance to obtain answers to many questions that involve dynamic treatment regimes. This paper describes a simple method to compare dynamic treatment regimes by artificially censoring subjects and then using inverse probability weighting (IPW) to adjust for any selection bias introduced by the artificial censoring. The basic strategy can be summarized in four steps: 1) define two regimes of interest, 2) artificially censor individuals when they stop following one of the regimes of interest, 3) estimate inverse probability weights to adjust for the potential selection bias introduced by censoring in the previous step, 4) compare the survival of the uncensored individuals under each regime of interest by fitting an inverse probability weighted Cox proportional hazards model with the dichotomous regime indicator and the baseline confounders as covariates. In the absence of model misspecification, the method is valid provided data are available on all time-varying and baseline joint predictors of survival and regime discontinuation. We present an application of the method to compare the AIDS-free survival under two dynamic treatment regimes in a large prospective study of HIV-infected patients. The paper concludes by discussing the relative advantages and disadvantages of censoring/IPW versus g-estimation of nested structural models to compare dynamic regimes.},
affiliation = {Department of Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA. miguel.hernan@post.harvard,edu},
number = {3},
pages = {237--42},
volume = {98},
year = {2006},
month = {Mar},
language = {eng},
keywords = {Disease-Free Survival, Probability, Pharmacoepidemiology, Clinical Trials as Topic, Data Interpretation: Statistical, Antiretroviral Therapy: Highly Active, Drug Administration Schedule, Selection Bias, Anti-HIV Agents, Acquired Immunodeficiency Syndrome, Treatment Refusal, Models: Statistical, Humans},
date-added = {2010-02-02 11:17:01 +0100},
date-modified = {2010-02-02 11:17:01 +0100},
doi = {10.1111/j.1742-7843.2006.pto_329.x},
pii = {PTOpto_329},
pmid = {16611197},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Hern%C3%A1n-2006-Basic%20Clin%20Pharmacol%20Toxicol_Comparison%20of%20dynami.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p4879},
rating = {0}
}

@article{Atkinson:1990p8586,
author = {L Atkinson},
journal = {Am J Ment Retard},
title = {Reliability and validity of ratio developmental quotients from the Cattell Infant Intelligence Scale},
abstract = {The test-retest reliability and predictive validity of developmental quotients (DQs) derived from the Cattell Infant Intelligence Scale as administered to children with mental retardation over 30 months of age was assessed. When DQs of 36 children assessed twice with the Cattell were compared, scores were highly correlated, with no significant difference between them, indicating impressive test score stability. When DQs of 47 youngsters assessed once with the Cattell and once with the Stanford-Binet, Form L-M, were compared, scores were significantly correlated but significantly discrepant. These results were compared to previous findings (Goldstein {\&} Sheaffer, 1988) on the Bayley Scales of Infant Development as a predictor of Stanford-Binet IQ. The DQs derived from the Bayley were superior to Cattell DQs in predicting Stanford-Binet IQ.},
affiliation = {Surrey Place Centre, Toronto, Ontario, Canada.},
number = {2},
pages = {215--9},
volume = {95},
year = {1990},
month = {Sep},
language = {eng},
keywords = {Male, Intelligence Tests, Female, Developmental Disabilities, Humans, Mental Retardation, Psychometrics, Reproducibility of Results, Child, Stanford-Binet Test, Child: Preschool},
date-added = {2010-03-22 00:10:21 +0100},
date-modified = {2010-03-22 00:10:21 +0100},
pmid = {1699557},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p8586},
rating = {0}
}

@article{Scaife:2009p11981,
author = {J C Scaife and T Duka},
journal = {Pharmacol Biochem Behav},
title = {Behavioural measures of frontal lobe function in a population of young social drinkers with binge drinking pattern},
abstract = {BACKGROUND: Binge drinking may lead to brain damage. The aim of the present study was to compare the cognitive abilities of binge and non-binge drinkers in tasks which test functions linked to discrete areas of the prefrontal cortex. METHODS: Non-binge and binge drinkers were identified according to their binge score derived from the Alcohol Use Questionnaire. Cognitive performance was tested with the Spatial Working Memory task (SWM) linked to the dorsolateral prefrontal cortex, Intra/Extradimensional Shift and reversal task (IED) linked to dorsolateral prefrontal cortex (shift) and to orbitofrontal cortex (reversal), Paired Associates Learning task (PAL) linked to temporal cortex, and Reaction Time Task (RTI) a task measuring motor impulsivity (Inferior frontal gyrus). Personality traits, alcohol outcome expectancies and mood were also evaluated. RESULTS: Binge drinkers recorded a significantly shorter movement time to target in the RTI, and completed fewer stages on first trial in the PAL, compared with non-bingers. In the IED as well as in the SWM, only female binge drinkers were more impaired than non-binge drinkers. CONCLUSIONS: Functions linked to dorsolateral prefrontal cortex may be more impaired in female, whereas functions linked with the temporal lobe may be impaired in both male and female binge drinkers compared to non-binge drinkers. Functions linked to orbitofrontal cortex were not impaired. The increased speed of response in the RTI in binge drinkers may indicate an increased motor impulsivity in binge drinkers.},
affiliation = {Laboratory of Experimental Psychology, University of Sussex, Falmer, Brighton BN1 9QG, United Kingdom.},
number = {3},
pages = {354--62},
volume = {93},
year = {2009},
month = {Sep},
language = {eng},
keywords = {Personality Tests, Space Perception, Substance-Related Disorders, Frontal Lobe, Humans, Male, Adult, Behavior, Cognition, Memory: Short-Term, Alcoholism, Neuropsychological Tests, Psychomotor Performance, Anxiety, Female, Affect, Reading, Young Adult, Association Learning, Reaction Time, Adolescent},
date-added = {2010-05-23 17:20:47 +0200},
date-modified = {2010-05-23 17:20:47 +0200},
doi = {10.1016/j.pbb.2009.05.015},
pii = {S0091-3057(09)00166-X},
pmid = {19497334},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p11981},
rating = {0}
}

@article{Pagano:2005p12313,
author = {Ian S Pagano and Carolyn C Gotay},
journal = {Health Qual Life Outcomes},
title = {Ethnic differential item functioning in the assessment of quality of life in cancer patients},
abstract = {BACKGROUND: Past research has shown that Filipino cancer patients report lower levels of quality of life (QoL) than other ethnic groups. One possible explanation for this is that Filipinos do not define QoL in the same manner as others, resulting in bias in their assessments. Hence, Filipinos would not necessarily have lower QoL. METHODS: Item response theory methods were used to assess differential item functioning (DIF) in the quality of life (measured by the EORTC QLQ-C30) of cancer patients across four ethnic groups (Caucasian, Filipino, Hawaiian, and Japanese). The sample consisted of 359 cancer patients. RESULTS: Results showed the presence of DIF on several items, indicating ethnic differences in the assessment of quality of life. Relative to the Caucasian and Japanese groups, items related to physical functioning, cognitive functioning, social functioning, nausea and vomiting, and financial difficulties exhibited DIF for Filipinos. On these items Filipinos exhibited either higher or lower QoL scores, even though their overall QoL was the same. CONCLUSION: This evidence may explain why Filipinos have previously been found to have lower overall QoL. Although Filipinos score lower on QoL than other groups, this may not reflect lower QoL, but rather differences in how QoL is defined. The presence of DIF did not appear, however, to alter the psychometric properties of the QLQ-C30.},
affiliation = {Cancer Research Center of Hawaii, Honolulu, HI 96813, USA. ian@crch.hawaii.edu},
pages = {60},
volume = {3},
year = {2005},
month = {Jan},
language = {eng},
keywords = {Hawaii, Female, Aged, Attitude to Health, Middle Aged, Questionnaires, Quality of Life, Sickness Impact Profile, Neoplasms, European Continental Ancestry Group, Cultural Characteristics, Japan, Male, Philippines, Humans, Psychometrics, Asian Americans},
date-added = {2010-06-12 09:32:59 +0200},
date-modified = {2010-06-12 09:33:22 +0200},
doi = {10.1186/1477-7525-3-60},
pii = {1477-7525-3-60},
pmid = {16209720},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Pagano-2005-Health%20and%20Quality%20of%20Life%20Outcomes_Ethnic%20differential.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p12313},
rating = {4}
}

@article{Levy:2009p10905,
author = {R Levy},
journal = {Journal of Probability and Statistics},
title = {The Rise of Markov Chain Monte Carlo Estimation for Psychometric Modeling},
abstract = {Markov chain Monte Carlo MCMC estimation strategies represent a powerful approach to estimation in psychometric models. Popular MCMC samplers and their alignment with Bayesian approaches to modeling are discussed. Key historical and current developments of MCMC are surveyed, emphasizing how MCMC allows the researcher to overcome the limitations of other estimation paradigms, facilitates the estimation of models that might otherwise be intractable, and frees the researcher from certain possible misconceptions about the models.},
year = {2009},
date-added = {2010-04-11 13:50:56 +0200},
date-modified = {2010-04-11 13:51:43 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Levy-2009-Journal%20of%20Probability%20and%20Statistics_The%20Rise%20of%20Markov%20C.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p10905},
rating = {4}
}

@article{Field:2006p12105,
author = {Tiffany Field and Miguel Diego and Maria Hernandez-Reif},
journal = {Infant Behav Dev},
title = {Prenatal depression effects on the fetus and newborn: a review},
abstract = {A review of research on prenatal depression effects on the fetus and newborn suggests that they experience prenatal, perinatal and postnatal complications. Fetal activity is elevated, prenatal growth is delayed, and prematurity and low birthweight occur more often. Newborns of depressed mothers then show a biochemical/physiological profile that mimics their mothers' prenatal biochemical/physiological profile including elevated cortisol, lower levels of dopamine and serotonin, greater relative right frontal EEG activation and lower vagal tone. Elevated prenatal maternal cortisol is the strongest predictor of these neonatal outcomes. Moderate pressure massage can alleviate these effects including reducing prematurity.},
affiliation = {Touch Research Institutes, University of Miami, School of Medicine, P.O. Box 016820, Miami, Florida, 33101, United States. tfield@med.miami.edu},
number = {3},
pages = {445--55},
volume = {29},
year = {2006},
month = {Jul},
language = {eng},
keywords = {Infant: Newborn, Fetus, Pregnancy, Female, Depressive Disorder, Prenatal Exposure Delayed Effects, Humans, Pregnancy Complications},
date-added = {2010-05-30 10:00:00 +0200},
date-modified = {2010-05-30 10:00:00 +0200},
doi = {10.1016/j.infbeh.2006.03.003},
pii = {S0163-6383(06)00031-2},
pmid = {17138297},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Field-2006-Infant%20Behav%20Dev_Prenatal%20depression.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p12105},
rating = {0}
}

@article{Krokavcova:2009p5423,
author = {Martina Krokavcova and Jitse P van Dijk and Iveta Nagyova and Jaroslav Rosenberger and Miriam Gavelova and Zuzana Gdovinova and Johan W Groothoff},
journal = {Scand J Caring Sci},
title = {Perceived health status as measured by the SF-36 in patients with multiple sclerosis: a review},
abstract = {Scand J Caring Sci; 2009 Perceived health status as measured by the SF-36 in patients with multiple sclerosis: a reviewThis review of literature gives an overview of recent studies about perceived health status as measured by the Short-Form-36 (SF-36) Health Survey in patients with multiple sclerosis (MS). The SF-36 is one of the tools measuring health status in patients used in international research and clinical practice. It measures two main health concepts - physical and mental. The SF-36 represents a valid instrument able to detect differences in perceived health status in patients. A computer-aided search in Medline and PsycINFO resulted in 504 articles in English published from 1996 to August 2006. After the screening process on the basis of abstracts, eight articles consisting of empirical studies remained in which perceived health status was evaluated using the SF-36 Health Survey. Seven studies focused on disability and perceived health status in the SF-36. Two studies focused on the relationship between depression and perceived health status. These studies showed that MS patients with low disability and minor depression scored significantly better than patients with high disability and major depression in the SF-36 health dimensions. Gender seems to have no influence on perceived health status in MS patients. The longer the disease duration and the more severe the disease, the lower the patients scored in perceived health status. The more disabled, the more depressive and the older the patients, the poorer their perceived health status was. Health providers supporting appropriate treatment might pay more attention to more disabled and more depressive patients, with longer disease duration. Perceived health status can be a predictor of prognosis and intervention outcomes. The study shows the importance of measuring perceived health status in MS patients with implications for their quality of life and provision of care.},
affiliation = {Department of Neurology, Faculty of Medicine, University of PJ Safarik, Kosice, Slovakia.},
pages = {},
year = {2009},
month = {Mar},
language = {ENG},
date-added = {2010-02-11 10:38:30 +0100},
date-modified = {2010-02-11 10:38:30 +0100},
doi = {10.1111/j.1471-6712.2008.00633.x},
pii = {SCS633},
pmid = {19302397},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Krokavcova-2009-Scand%20J%20Caring%20Sci_Perceived%20health%20sta.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p5423},
rating = {0}
}

@article{Bauchet:2007p1837,
author = {Marc Bauchet and Brian McEvoy and Laurel N Pearson and Ellen E Quillen and Tamara Sarkisian and Kristine Hovhannesyan and Ranjan Deka and Daniel G Bradley and Mark D Shriver},
journal = {Am J Hum Genet},
title = {Measuring European population stratification with microarray genotype data},
abstract = {A proper understanding of population genetic stratification--differences in individual ancestry within a population--is crucial in attempts to find genes for complex traits through association mapping. We report on genomewide typing of approximately 10,000 single-nucleotide polymorphisms in 297 individuals, to explore population structure in Europeans of known and unknown ancestry. The results reveal the presence of several significant axes of stratification, most prominently in a northern-southeastern trend, but also along an east-west axis. We also demonstrate the selection and application of EuroAIMs (European ancestry informative markers) for ancestry estimation and correction. The Coriell Caucasian and CEPH (Centre d'Etude du Polymorphisme Humain) Utah sample panels, often used as proxies for European populations, are found to reflect different subsets of the continent's ancestry.},
affiliation = {Department of Anthropology, Pennsylvania State University, University Park, PA 16801, USA. marcb@psu.edu},
number = {5},
pages = {948--56},
volume = {80},
year = {2007},
month = {May},
language = {eng},
keywords = {Genetics: Population, Continental Population Groups, Genotype, Ethnic Groups, Humans, Oligonucleotide Array Sequence Analysis, Data Interpretation: Statistical, Polymorphism: Single Nucleotide, Europe},
date-added = {2010-01-09 23:09:05 +0100},
date-modified = {2010-07-29 19:13:31 +0200},
doi = {10.1086/513477},
pii = {S0002-9297(07)60950-1},
pmid = {17436249},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Bauchet-2007-Am%20J%20Hum%20Genet_Measuring%20European%20p.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1837},
rating = {0}
}

@article{Chen:2008p3295,
author = {Xiaowu Chen and Zhaohai Li},
journal = {Biom J},
title = {Inference of haplotype effects in case-control studies using unphased genotype and environmental data},
abstract = {A retrospective likelihood-based approach was proposed to test and estimate the effect of haplotype on disease risk using unphased genotype data with adjustment for environmental covariates. The proposed method was also extended to handle the data in which the haplotype and environmental covariates are not independent. Likelihood ratio tests were constructed to test the effects of haplotype and gene-environment interaction. The model parameters such as haplotype effect size was estimated using an Expectation Conditional-Maximization (ECM) algorithm developed by Meng and Rubin (1993). Model-based variance estimates were derived using the observed information matrix. Simulation studies were conducted for three different genetic effect models, including dominant effect, recessive effect, and additive effect. The results showed that the proposed method generated unbiased parameter estimates, proper type I error, and true beta coverage probabilities. The model performed well with small or large sample sizes, as well as short or long haplotypes.},
affiliation = {Department of Biostatistics, Human Genome Sciences, Inc., 14200 Shady Grove Rd. Rockville, MD, USA.},
number = {2},
pages = {270--82},
volume = {50},
year = {2008},
month = {Apr},
language = {eng},
keywords = {Likelihood Functions, Humans, Environment, Retrospective Studies, Models: Statistical, Haplotypes, Case-Control Studies, Diabetes Mellitus: Type 2, Computer Simulation, Models: Genetic, Algorithms},
date-added = {2010-01-14 21:23:46 +0100},
date-modified = {2010-07-29 19:19:18 +0200},
doi = {10.1002/bimj.200710396},
pmid = {18217697},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p3295},
rating = {0}
}

@incollection{Guerra2006,
author = {R Guerra and Z Yu},
journal = {Collection},
title = {Single nucleotide polymorphisms and their applications},
chapter = {16},
pages = {311--349},
year = {2006},
date-added = {2010-01-12 14:26:52 +0100},
date-modified = {2010-07-29 19:24:08 +0200},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2529},
rating = {0}
}

@article{Friedman:2010p4934,
author = {J Friedman and T Hastie and R Tinshirani},
journal = {Journal of Statistical Software},
title = {Regularization Paths for Generalized Linear Models via Coordinate Descent},
abstract = {We develop fast algorithms for estimation of generalized linear models with convex penalties. The models include linear regression, two-class logistic regression, and multi- nomial regression problems while the penalties include l1 (the lasso), l2 (ridge regression) and mixtures of the two (the elastic net). The algorithms use cyclical coordinate descent, computed along a regularization path. The methods can handle large problems and can also deal efficiently with sparse features. In comparative timings we find that the new algorithms are considerably faster than competing methods.},
number = {1},
volume = {33},
year = {2010},
date-added = {2010-02-03 11:20:03 +0100},
date-modified = {2010-02-03 11:26:00 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Friedman-2010-Journal%20of%20Statistical%20Software_Regularization%20Paths.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p4934},
rating = {0}
}

@article{Khanna:2007p8434,
author = {Dinesh Khanna and Joel Tsevat},
journal = {Am J Manag Care},
title = {Health-related quality of life--an introduction},
abstract = {Chronic diseases often have a relapsing and remitting course with substantial impact on function and quality of life. Rheumatoid arthritis (RA) is considered a chronic, inflammatory autoimmune disorder that causes disabling and painful inflammation in the joints that can lead to detrimental effects on health-related quality of life (HRQOL). This article provides an overview of HRQOL and a comprehensive description of the attributes of different instruments to measure it. A wide variety of instruments have been created to measure HRQOL using 2 approaches: health status and health utility. Commonly used generic health status instruments in RA are the Medical Outcomes Study 36-Item Short Form (SF-36) and the Health Assessment Questionnaire Disability Index. Health utility measures are divided into 2 categories, direct and indirect. The most common direct health utility measures are the standard gamble, time to trade-off, and rating scale, while the most commonly used indirect measures are EuroQOL, SF-6D, and the Health Utility Index. Different applications of the instruments are analyzed in this article, including their utility to estimate burden of disease, as end points in clinical trials, and to monitor outcomes in clinical practice, as well as their uses in public policy and in individual decision making.},
affiliation = {Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, 1000 Veterans Ave, Rm 32-59 Rehabilitation Bldg, Los Angeles, CA 90095, USA. dkhanna@mednet.ucla.edu},
pages = {S218--23},
volume = {13 Suppl 9},
year = {2007},
month = {Dec},
language = {eng},
keywords = {Quality of Life, Humans, Chronic Disease, Health Status, Arthritis: Rheumatoid},
date-added = {2010-03-21 17:53:35 +0100},
date-modified = {2010-03-21 17:53:35 +0100},
pii = {6902},
pmid = {18095785},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p8434},
rating = {0}
}

@article{Wu:2010p10678,
author = {Li-Tzy Wu and Jeng-Jong Pan and Chongming Yang and Bryce B Reeve and Dan G Blazer},
journal = {Addict Behav},
title = {An item response theory analysis of DSM-IV criteria for hallucinogen abuse and dependence in adolescents},
abstract = {AIM: This study applied both item response theory (IRT) and multiple indicators-multiple causes (MIMIC) methods to evaluate item-level psychometric properties of diagnostic questions for hallucinogen use disorders (HUDs), differential item functioning (DIF), and predictors of latent HUD. METHODS: Data were drawn from 2004-2006 National Surveys on Drug Use and Health. Analyses were based on 1548 past-year hallucinogen users aged 12-17 years. Substance use and symptoms were assessed by audio computer-assisted self-interviewing methods. RESULTS: Abuse and dependence criteria empirically were arrayed along a single continuum of severity. All abuse criteria indicated middle-to-high severity on the IRT-defined HUD continuum, while dependence criteria captured a wider range from the lowest (tolerance and time spent) to the highest (taking larger amounts and inability to cut down) severity levels. There was indication of DIF by hallucinogen users' age, gender, race/ethnicity, and ecstasy use status. Adjusting for DIF, ecstasy users (vs. non-ecstasy hallucinogen users), females (vs. males), and whites (vs. Hispanics) exhibited increased odds of HUD. CONCLUSIONS: Symptoms of hallucinogen abuse and dependence empirically do not reflect two discrete conditions in adolescents. Trends and problems related to hallucinogen use among girls and whites should be examined further to inform the designs of effective gender-appropriate and culturally sensitive prevention programs.},
affiliation = {Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27710, USA. litzy.wu@duke.edu},
number = {3},
pages = {273--7},
volume = {35},
year = {2010},
month = {Mar},
language = {eng},
date-added = {2010-04-07 11:53:20 +0200},
date-modified = {2010-07-29 19:12:35 +0200},
doi = {10.1016/j.addbeh.2009.10.009},
pii = {S0306-4603(09)00274-3},
pmid = {19896773},
URL = {http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VC9-4XHCJ44-2&_user=2432700&_coverDate=03%252F31%252F2010&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000057263&_version=1&_urlVersion=0&_userid=2432700&md5=721b6f40fa0157870ad3c349b0144bd4},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Wu-2010-Addict%20Behav_An%20item%20response%20the.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p10678},
rating = {0}
}

@article{Chung:2010p12307,
author = {Dongjun Chung and Sunduz Keles},
journal = {Statistical Applications in Genetics and Molecular Biology},
title = {Sparse partial least squares classification for high dimensional data},
abstract = {Partial least squares (PLS) is a well known dimension reduction method which has been recently adapted for high dimensional classification problems in genome biology. We develop sparse versions of the recently proposed two PLS-based classification methods using sparse partial least squares (SPLS). These sparse versions aim to achieve variable selection and dimension reduction simultaneously. We consider both binary and multicategory classification. We provide analytical and simulation-based insights about the variable selection properties of these approaches and benchmark them on well known publicly available datasets that involve tumor classification with high dimensional gene expression data. We show that incorporation of SPLS into a generalized linear model (GLM) framework provides higher sensitivity in variable selection for multicategory classification with unbalanced sample sizes between classes. As the sample size increases, the two-stage approach provides comparable sensitivity with better specificity in variable selection. In binary classification and multicategory classification with balanced sample sizes, the two-stage approach provides comparable variable selection and prediction accuracy as the GLM version and is computationally more efficient.},
affiliation = {University of Wisconsin, Madison, USA. chungdon@stat.wisc.edu},
number = {1},
pages = {Article 17},
volume = {9},
year = {2010},
month = {Jan},
language = {eng},
keywords = {Linear Models, Gene Expression Profiling, Databases: Genetic, Humans, Least-Squares Analysis, Biostatistics, Male, Prostatic Neoplasms, Oligonucleotide Array Sequence Analysis, Genomics, Lymphoma, Computer Simulation, Likelihood Functions},
date-added = {2010-06-09 21:08:56 +0200},
date-modified = {2010-06-09 21:08:56 +0200},
pmid = {20232521},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Chung-2010-Statistical%20Applications%20in%20Genetics%20and%20Molecular%20Biology_Sparse%20partial%20least.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p12307},
rating = {0}
}

@article{Ramm:2009p3408,
author = {A. G Ramm},
journal = {arXiv},
title = {Dimension reduction in representation of the data},
abstract = { Suppose the data consist of a set {\$}S{\$} of points {\$}x_j{\$}, {\$}1\leq j \leq J{\$}, distributed in a bounded domain {\$}D\subset R^N{\$}, where {\$}N{\$} is a large number. An algorithm is given for finding the sets {\$}L_k{\$} of dimension {\$}k\ll N{\$}, {\$}k=1,2,...K{\$}, in a neighborhood of which maximal amount of points {\$}x_j\in S{\$} lie. The algorithm is different from PCA (principal component analysis) },
eprint = {0902.4389v1},
volume = {stat.ML},
year = {2009},
month = {Jan},
keywords = {62H35, stat.TH, stat.ML, math.ST, math.NA},
date-added = {2010-01-15 14:45:37 +0100},
date-modified = {2010-01-15 14:45:37 +0100},
pmid = {0902.4389v1},
URL = {http://arxiv.org/abs/0902.4389v1},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Ramm-2009-arXiv_Dimension%20reduction.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p3408},
rating = {0}
}

@article{Bro:2006p11615,
author = {R Bro},
journal = {Critical Reviews in Analytical Chemistry},
title = {Review on Multiway Analysis in Chemistry---2000--2005},
abstract = {This review describes advances in multiway analysis during the period 2000--2005. Multiway analysis started to take off in chemistry in the 1980s, but only in recent years has it been broadly applied to many diverse kinds of data. This review reflects how the field has matured and how the methods have been applied to more and more difficult types of data in new research areas. Multiway analysis is described in terms of different types of data, different areas of applications as well as more fundamental and theoretical results throughout the period. It is evident from this review that multiway analysis is presently a generally accepted and used tool whose full potential is far from reached.},
pages = {279--293},
volume = {36},
year = {2006},
date-added = {2010-05-11 21:44:26 +0200},
date-modified = {2010-05-11 21:45:09 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Bro-2006-Critical%20Reviews%20in%20Analytical%20Chemistry_Review%20on%20Multiway%20A.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p11615},
rating = {0}
}

@article{Quene:2004p3543,
author = {H Quen{\'e}},
title = {On multi-level modeling of data from repeated measures designs: A tutorial},
abstract = {Data from repeated measures experiments are usually analyzed with conventional ANOVA. Three well-known problems with ANOVA are the sphericity assumption, the design effect (sampling hierarchy), and the requirement for complete designs and data sets. This tutorial explains and demonstrates multi-level modeling (MLM) as an alternative analysis tool for repeated measures data. MLM allows us to estimate variance and covariance components explicitly. MLM does not require sphericity, it takes the sampling hierarchy into account, and it is capable of analyzing incom- plete data. A fictitious data set is analyzed with MLM and ANOVA, and analysis results are compared. Moreover, existing data from a repeated measures design are re-analyzed with MLM, to demonstrate its advantages. Monte Carlo simulations suggest that MLM yields higher power than ANOVA, in particular under realistic circumstances. Although technically complex, MLM is recommended as a useful tool for analyzing repeated measures data from speech research.},
year = {2004},
date-added = {2010-01-15 20:56:29 +0100},
date-modified = {2010-01-15 20:57:00 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Quen%C3%A9-2004-_On%20multi-level%20model.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p3543},
rating = {0}
}

@article{Ark:2005,
author = {L Andries van der Ark},
journal = {Psychometrika},
title = {Stochastic Ordering of the Latent Trait by the Sum Score Under Various Polytomous IRT Models},
number = {2},
pages = {283--304},
volume = {70},
year = {2005},
date-added = {2010-01-10 11:33:22 +0100},
date-modified = {2010-07-29 20:42:55 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Andries%20van%20der%20Ark-2005-Psychometrika_Stochastic%20Ordering.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2072},
rating = {0}
}

@article{Revicki:2008p8514,
author = {Dennis Revicki and Ron D Hays and David Cella and Jeff Sloan},
journal = {Journal of Clinical Epidemiology},
title = {Recommended methods for determining responsiveness and minimally important differences for patient-reported outcomes},
abstract = {OBJECTIVE: The objective of this review is to summarize recommendations on methods for evaluating responsiveness and minimal important difference (MID) for patient-reported outcome (PRO) measures. STUDY DESIGN AND SETTING: We review, summarize, and integrate information on issues and methods for evaluating responsiveness and determining MID estimates for PRO measures. Recommendations are made on best-practice methods for evaluating responsiveness and MID. RESULTS: The MID for a PRO instrument is not an immutable characteristic, but may vary by population and context, and no one MID may be valid for all study applications. MID estimates should be based on multiple approaches and triangulation of methods. Anchor-based methods applying various relevant patient-rated, clinician-rated, and disease-specific variables provide primary and meaningful estimates of an instrument's MID. Results for the PRO measures from clinical trials can also provide insight into observed effects based on treatment comparisons and should be used to help determine MID. Distribution-based methods can support estimates from anchor-based approaches and can be used in situations where anchor-based estimates are unavailable. CONCLUSION: We recommend that the MID is based primarily on relevant patient-based and clinical anchors, with clinical trial experience used to further inform understanding of MID.},
affiliation = {Center for Health Outcomes Research, United Biosource Corporation, 7101 Wisconsin Avenue, Suite 600, Bethesda, MD 20814, USA. dennis.revicki@unitedbiosource.com},
number = {2},
pages = {102--9},
volume = {61},
year = {2008},
month = {Feb},
language = {eng},
keywords = {Clinical Trials as Topic, Humans, Health Status Indicators, Outcome Assessment (Health Care), Patient Satisfaction, Quality of Life, Data Interpretation: Statistical, Treatment Outcome, Research Design},
date-added = {2010-03-21 20:39:12 +0100},
date-modified = {2010-03-21 20:39:12 +0100},
doi = {10.1016/j.jclinepi.2007.03.012},
pii = {S0895-4356(07)00119-9},
pmid = {18177782},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Revicki-2008-Journal%20of%20Clinical%20Epidemiology_Recommended%20methods.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p8514},
rating = {0}
}

@article{Hall:2006p7869,
author = {Stephen F Hall},
journal = {Journal of Clinical Epidemiology},
title = {A user's guide to selecting a comorbidity index for clinical research},
abstract = {You are creating a data abstraction form to assess the case mix, treatments, and treatment outcome for patients with cancer of the larynx at your center. You plan to perform univariate analysis including Kaplan-Meier curves with log-rank tests and multiple variable analysis to account for effect of disease and age on outcome. At your center some patients have radiotherapy, some have chemotherapy in association with radiotherapy, and some have primary surgery. A specific patient's treatment is based on the extent of disease and overall health. Patients with cancer of the larynx frequently have a variety of comorbid illnesses, often related to smoking and alcohol. For example, Mr. J.B. presented to the coronary care unit with his third myocardial infarction and was found to have a new cancer of the larynx. Due to his chronic obstructive pulmonary disease (COPD), diabetes, and past pulmonary embolus, he is not a candidate for either coronary revascularization or laryngectomy. How do you measure the impact of the comorbid illnesses on the decisions and the outcomes?},
affiliation = {Division of Cancer Care and Epidemiology, Queen's Cancer Research Institute, Kingston, Ontario K7L 3N6, Canada. sfh@post.queensu.ca},
number = {8},
pages = {849--55},
volume = {59},
year = {2006},
month = {Aug},
language = {eng},
keywords = {Male, Risk, Humans, Biomedical Research, Outcome Assessment (Health Care), Reproducibility of Results, Female, Severity of Illness Index, Comorbidity},
date-added = {2010-03-20 19:10:43 +0100},
date-modified = {2010-03-20 19:10:47 +0100},
doi = {10.1016/j.jclinepi.2005.11.013},
pii = {S0895-4356(05)00436-1},
pmid = {16828679},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Hall-2006-Journal%20of%20Clinical%20Epidemiology_A%20user's%20guide%20to%20se.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p7869},
rating = {3}
}

@article{Johnson:2002p2364,
author = {C Johnson and S W Raudenbush},
title = {A repeated measures, multilevel Rasch model with application to self-reported criminal behavior},
abstract = {Repeated measures data generated from longitudinal designs are often used when studying correlates of individual change.	Such studies pose several challenges: (1) The measurement scale must be invariant over time; (2) covariates of interest are often multilevel (e.g., measured at the person and neighborhood level); (3) some item-level missing data can be expected. To cope with these challenges, we propose a repeated measures, multilevel Rasch model with random effects. Under assumptions of conditional independence, additivity, and measurement invariance over time, the approach enables the investigator to calibrate the items and persons on an interval scale, incorporate covariates at each level, and accommodate data missing at random. Using data on 8 items tapping violent crime from 2,842 adolescents ages 9- 18 nested within 196 census tracts in Chicago, we illustrate how to test key assumptions, how to adjust the model in light of diagnostic analyses, and how to interpret parameter estimates.},
year = {2002},
date-added = {2010-01-10 13:39:18 +0100},
date-modified = {2010-01-10 13:40:17 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Johnson-2002-_A%20repeated%20measures.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2364},
rating = {0}
}

@techreport{DeMaio:1993,
author = {T DeMaio and N Mathiowetz and J Rothgeb and ME Beach and S Durant},
journal = {Techreport},
title = {Protocol for Pretesting Demographic Surveys at the Census Bureau},
abstract = {The Census Bureau is interested in increasing the amount of pretesting performed on the surveys it conducts and also encouraging the use of recent innovations in pretesting activities. To this end, an interdivisional committee was established within the Bureau to experiment with alternative pretesting activities for surveys in the demographic area and to produce a monograph that develops guidelines for pretesting questionnaires, and specifies a range of pretesting options based on the amount of time and resources available. This monograph covers the following pretest methods: cognitive interviewing techniques, focus groups, behavior coding and analysis, respondent debriefing, interviewer debriefing, split panel tests, and item nonresponse and response distribution analysis. It provides overviews of the methods themselves as well as a discussion of issues involved in their use (e.g., time and cost, study design, reporting of results). It also presents three case studies of the use of these methods in pretesting demographic surveys.},
affiliation = {Wahsington, DC: U.S. Census Bureau},
year = {1993},
date-added = {2010-01-03 19:34:17 +0100},
date-modified = {2010-01-03 19:34:18 +0100},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p985},
rating = {0}
}

@article{Ludbrook:2008p424,
author = {John Ludbrook},
journal = {Int J Epidemiol},
title = {Analysis of 2 x 2 tables of frequencies: matching test to experimental design},
abstract = {BACKGROUND: Biomedical investigators often use unsuitable statistical techniques for analysing the 2 x 2 tables that result from their experimental observations. This is because they are confused by the conflicting, and sometimes inaccurate, advice they receive from statistical texts or statistical consultants. METHODS: These consist of a review of published work, and the use of five different statistical procedures to analyse a 2 x 2 table, executed by StatXact 8.0, Testimate 6.0, Stata 10.0, SAS 9.1 and SPSS 16.0. Discussion and Conclusions It is essential to classify a 2 x 2 table before embarking on its analysis. A useful classification is into (i) Independence trials (doubly conditioned). These almost never occur in biomedical research because they involve predetermining the column and row totals in a 2 x 2 table. The Fisher exact test is the best method for analysing these trials. (ii) Comparative trials (singly conditioned). These correspond to the usual experimental design in biomedical work, in which a sample of convenience is randomized into two treatment groups, so that the group (column) totals are fixed in advance. The proper tests of significance are exact tests on the odds ratio, on the ratio of proportions (relative risk and risk ratio) or on the difference between proportions. (iii) Double dichotomy trials (unconditional). In these, a genuine random sample is taken from a defined population. Thus, neither column nor row totals are fixed in advance. The only practicable test is Pearson's chi(2)-test. In analysing any of the above trials, exact tests are to be much preferred to asymptotic (approximate) tests. The different commercial software packages use different algorithms for exact tests, and can give different outcomes in terms of P-values and confidence intervals. The most useful are StatXact and Testimate.},
affiliation = {Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia. ludbrook@bigpond.net.au},
number = {6},
pages = {1430--5},
volume = {37},
year = {2008},
month = {Dec},
language = {eng},
keywords = {Risk, Data Interpretation: Statistical, Sampling Studies, Humans, Clinical Trials as Topic, Algorithms, Probability, Chi-Square Distribution},
date-added = {2010-01-03 12:21:34 +0100},
date-modified = {2010-01-03 12:21:34 +0100},
doi = {10.1093/ije/dyn162},
pii = {dyn162},
pmid = {18710887},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Ludbrook-2008-Int%20J%20Epidemiol_Analysis%20of%202%20x%202%20ta.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p424},
rating = {0}
}

@article{Prendergast:2008p1229,
author = {Luke A Prendergast},
journal = {Electronic Journal of Statistics},
title = {A note on sensitivity of principal component subspaces and the efficient detection of influential observations in high dimensions},
abstract = {In this paper we introduce an influence measure based on sec- ond order expansion of the RV and GCD measures for the comparison between unperturbed and perturbed eigenvectors of a symmetric matrix estimator. Example estimators are considered to highlight how this mea- sure compliments recent influence analysis. Importantly, we also show how a sample based version of this measure can be used to accurately and effi- ciently detect influential observations in practice.},
affiliation = {La Trobe University Dept of Mathematics and Statistics, La Trobe University, VIC 3086, Australia},
pages = {454--467},
volume = {2},
year = {2008},
keywords = {distance between subspaces, influential observations, perturbation, Principal Component Analysis},
date-added = {2010-01-03 19:55:58 +0100},
date-modified = {2010-01-03 19:57:56 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Prendergast-2008-Electronic%20Journal%20of%20Statistics_A%20note%20on%20sensitivit.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1229},
read = {Yes},
rating = {0}
}

@article{Borsboom:2007p5477,
author = {D Borsboom and C V Dolan},
journal = {Measurement: Interdisciplinary Research {\&} Perspective},
title = {Theoretical equivalence, measurement invariance, and the idiographic filter},
number = {4},
pages = {236--243},
volume = {5},
year = {2007},
date-added = {2010-02-12 14:31:36 +0100},
date-modified = {2010-02-12 14:36:01 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Borsboom-2007-Measurement%20Interdisciplinary%20Research%20&%20Perspective_Theoretical%20equivale.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p5477},
rating = {0}
}

@article{Juras:2006p910,
author = {Josip Juras and Z Pasaric},
journal = {Geofizika},
title = {Application of tetrachoric and polychoric correlation coefficients to forecast verification},
abstract = {The measure of association in 2 x 2 (K x K) contingency tables known as tetrachoric (polychoric) correlation coefficient is recalled. These measures rely on two assumptions: 1) there exist continuous latent variables under- lying the contingency table and 2) joint distribution of corresponding stan- dard normal deviates is bivariate normal. It is shown that, in practice, the tetrachoric (polychoric) correlation coefficient is an estimate of Pearson cor- relation coefficient between the latent variables. Consequently, these mea- sures do not depend on bias nor on marginal frequencies of the table, which implies a natural and convenient partition of information (carried by the contingency table), between association, bias and probability of the event and subsequently enables the analysis of how other scores depend on bias and marginal frequencies. Results extended to K x K tables lead to eventual re- duction in dimensionality from K2 to 2K. The theoretical findings are il- lustrated through analysis of real-life, 6  ́ 6 contingency tables on verification of quantitative precipitation forecasts.},
affiliation = {Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia},
number = {1},
pages = {59--82},
volume = {23},
year = {2006},
keywords = {contingency table, forecast evaluation, tetrachoric correlation coefficient},
date-added = {2010-01-03 18:50:48 +0100},
date-modified = {2010-01-03 18:52:53 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Juras-2006-Geofizika_Application%20of%20tetra.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p910},
rating = {0}
}

@article{Irizarry:2009p1500,
author = {Rafael A Irizarry and Chi Wang and Yun Zhou and Terence P Speed},
journal = {Stat Methods Med Res},
title = {Gene set enrichment analysis made simple},
abstract = {Among the many applications of microarray technology, one of the most popular is the identification of genes that are differentially expressed in two conditions. A common statistical approach is to quantify the interest of each gene with a p-value, adjust these p-values for multiple comparisons, choose an appropriate cut-off, and create a list of candidate genes. This approach has been criticised for ignoring biological knowledge regarding how genes work together. Recently a series of methods, that do incorporate biological knowledge, have been proposed. However, the most popular method, gene set enrichment analysis (GSEA), seems overly complicated. Furthermore, GSEA is based on a statistical test known for its lack of sensitivity. In this article we compare the performance of a simple alternative to GSEA. We find that this simple solution clearly outperforms GSEA. We demonstrate this with eight different microarray datasets.},
affiliation = {Department of Biostatistics, Johns Hopkins School of Public Health, Baltimore, MD 21205, USA.},
number = {6},
pages = {565--75},
volume = {18},
year = {2009},
month = {Dec},
language = {eng},
date-added = {2010-01-07 12:26:28 +0100},
date-modified = {2010-01-07 12:26:28 +0100},
doi = {10.1177/0962280209351908},
pii = {18/6/565},
pmid = {20048385},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Irizarry-2009-Stat%20Methods%20Med%20Res_Gene%20set%20enrichment.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1500},
rating = {0}
}

@article{Tibshirani:2005p12330,
author = {R Tibshirani and M Saunders and S Rosset and J Zhu and K Knight},
journal = {Journal of the Royal Society, Serie B},
title = {Sparsity and smoothness via the fused lasso},
abstract = {The lasso penalizes a least squares regression by the sum of the absolute values (L1-norm) of the coefficients. The form of this penalty encourages sparse solutions (with many coefficients equal to 0). We propose the `fused lasso', a generalization that is designed for prob- lems with features that can be ordered in some meaningful way. The fused lasso penalizes the L1-norm of both the coefficients and their successive differences. Thus it encourages sparsity of the coefficients and also sparsity of their differences---i.e. local constancy of the coefficient profile. The fused lasso is especially useful when the number of features p is much greater than N , the sample size. The technique is also extended to the `hinge' loss function that underlies the support vector classifier.We illustrate the methods on examples from protein mass spectroscopy and gene expression data.},
number = {1},
pages = {91--108},
volume = {67},
year = {2005},
date-added = {2010-06-12 10:08:10 +0200},
date-modified = {2010-07-29 19:38:24 +0200},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Tibshirani-2005-Journal%20of%20the%20Royal%20Society%20Serie%20B_Sparsity%20and%20smoothn.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p12330},
rating = {4}
}

@article{Friedman:2010p5892,
author = {J Friedman and T Hastie and R Tibshirani},
title = {A note on the group lasso and a sparse group lasso},
abstract = {We consider the group lasso penalty for the linear model. We note that the standard algorithm for solving the problem assumes that the model matrices in each group are orthonormal. Here we consider a more general penalty that blends the lasso (L1) with the group lasso (``two-norm''). This penalty yields solutions that are sparse at both the group and individual feature levels. We derive an efficient algorithm for the resulting convex problem based on coordinate descent. This algorithm can also be used to solve the general form of the group lasso, with non-orthonormal model matrices.},
year = {2010},
date-added = {2010-02-17 21:06:35 +0100},
date-modified = {2010-02-17 21:07:28 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Friedman-2010-_A%20note%20on%20the%20group.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p5892},
rating = {0}
}

@article{Lin:2008p2975,
author = {Haiqun Lin and Ziding Feng and Yan Yu and Yingye Zheng and Narayan Shivapurkar and Adi F Gazdar},
journal = {JAMA},
title = {Application of Multidimensional Selective Item Response Regression Model for Studying Multiple Gene Methylation in SV40 Oncogenic Pathways},
abstract = {Alteration of gene methylation patterns has been reported to be involved in the early onsets of many human malignancies. Many exogenous risk factors, such as cigarette smoke, dietary additives, chemical exposures, radiation, and biologic agents including viral infection, are involved in the methylation pathways of cancers. We propose a multidimensional selective item response regression model to describe and test how a risk factor may alter molecular pathways involving aberrant methylation of multiple genes in oncogenesis. Our modeling framework is built on an item response model for multivariate dichotomous responses of high dimension, such as aberrant methylation of multiple tumor-suppressor genes, but we allow risk factors such as SV40 viral infection to alter the distribution of the latent factors that subsequently affect the outcome of cancer. We postulate empirical identification conditions under our model formulation. Moreover, we do not prespecify the links between the multiple dichotomous methylation responses and the latent factors, but rather conduct specification searches with a genetic algorithm to discover the links. Parameter estimation through maximum likelihood and specification searches in models with multidimensional latent factors for multivariate binary responses have become practical only recently, due to modern statistical computing development. We illustrate our proposal with the biological finding that simultaneous methylation of multiple tumor-suppressor genes is associated with the presence of SV40 viral sequences and with the cancer status of lymphoma/leukemia.We are able to test whether the data are consistent with the causal hypothesis that SV40 induces aberrant methylation of multiple genes in its oncogenic pathways. At the same time, we are able to evaluate the role of SV40 in the methylation pathway and to determine whether the methylation pathway is responsible for the development of leukemia/lymphoma.},
affiliation = {Division of Biostatistics, Yale University School of Medicine, New Haven, CT 06520 ( haiqun.lin@yale.edu ).},
number = {481},
pages = {201--211},
volume = {103},
year = {2008},
month = {Mar},
language = {ENG},
date-added = {2010-01-13 23:06:22 +0100},
date-modified = {2010-07-29 20:01:35 +0200},
doi = {10.1198/016214507000000428},
pmid = {19830254},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Lin-2008-JAMA_Application%20of%20Multi.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p2975},
rating = {0}
}

@article{Balder:2003p12053,
author = {Helena F Balder and Mikko Virtanen and Henny A M Brants and Vittorio Krogh and L Beth Dixon and Frans Tan and Satu Mannisto and Rino Bellocco and Pirjo Pietinen and Alicja Wolk and Franco Berrino and Piet A Van den Brandt and Anne M Hartman and R Alexandra Goldbohm},
journal = {J Nutr},
title = {Common and country-specific dietary patterns in four European cohort studies},
abstract = {The association between diet and cancer, predominantly investigated univariately, has often been inconsistent, possibly because of the large number of candidate risk factors and their high intercorrelations. Analysis of dietary patterns is expected to give more insight than analysis of single nutrients or foods. This study aimed to develop and apply a common methodological approach to determine dietary patterns in four cohort studies originating in Finland, the Netherlands, Sweden and Italy. Food items on each of the food frequency questionnaires were aggregated into 51 food groups, defined on the basis of their position in the diet pattern and possible relevance to cancer etiology. Exploratory factor analysis was used to analyze dietary patterns. Using a standardized approach, 3-5 stable dietary patterns were identified, explaining 20-29% of total variance in consumption of the food groups. Two dietary patterns, which explained most of the variance, were consistent across the studies. The first pattern was characterized by high consumption of (salad) vegetables, the second by high consumption of pork, processed meat and potatoes. In addition, a few specifically national food patterns were identified. Sensitivity analyses showed that the identified patterns were robust for number of factors extracted, distribution of input variables and energy adjustment. Our findings suggest that some important eating patterns are shared by the four populations under study, whereas other eating patterns are population specific.},
affiliation = {Department of Nutritional Epidemiology, TNO Nutrition and Food Research, Zeist, The Netherlands. balder@voeding.tno.nl},
number = {12},
pages = {4246--51},
volume = {133},
year = {2003},
month = {Dec},
language = {eng},
keywords = {Solanum tuberosum, Middle Aged, Food Habits, Models: Theoretical, Humans, Principal Component Analysis, Randomized Controlled Trials as Topic, Adult, Sweden, Finland, Male, Meat, Italy, Female, Meat Products, Aged, Prospective Studies, Cohort Studies, Factor Analysis: Statistical, Netherlands, Animals, Vegetables, Swine},
date-added = {2010-05-24 10:38:12 +0200},
date-modified = {2010-05-24 10:38:19 +0200},
pmid = {14652380},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Balder-2003-J%20Nutr_Common%20and%20country-s.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p12053},
rating = {4}
}

@article{vanNispen:2010p6519,
author = {Ruth M A van Nispen and Dirk L Knol and Han J Neve and Ger H M B van Rens},
journal = {Journal of Clinical Epidemiology},
title = {A multilevel item response theory model was investigated for longitudinal vision-related quality-of-life data},
abstract = {OBJECTIVE: To investigate how a multilevel item response theory (IRT) model for longitudinal dependent data could provide average and individual quality-of-life outcomes of low-vision rehabilitation. STUDY DESIGN AND SETTING: In a nonrandomized longitudinal design, visually impaired older patients (n=296) were referred to multidisciplinary rehabilitation or to an optometric service. The five-dimensional Low Vision Quality of Life Questionnaire was administered at four time points. The IRT model was characterized by the graded response model for rating scales. Covariates were added to the model, mainly to correct for missing data. The invariance assumption across time points was investigated. RESULTS: Average and individual rehabilitation effects were estimated. For multidisciplinary rehabilitation, significant average deterioration was seen on three dimensions after 4.4 years. Many individuals in the optometric service group significantly improved on the "reading small print" dimension (18.5%); in both groups, many individuals significantly deteriorated on "visual (motor) skills" (22.2-30.0%). Invariance across time points could be assumed for all dimensions, except for "adjustment." Gender, education, visual acuity, and health status were significantly associated with the outcome. CONCLUSION: We present how a multilevel IRT model can be applied to describe longitudinal dependent vision-related quality-of-life data, while focusing on average and individual effects.},
affiliation = {Department of Ophthalmology, VU University Medical Center Amsterdam, Amsterdam, The Netherlands; The EMGO Institute for Health and Care Research (EMGO+) VU University Medical Center Amsterdam, Amsterdam, The Netherlands.},
number = {3},
pages = {321--330},
volume = {63},
year = {2010},
month = {Mar},
language = {ENG},
date-added = {2010-02-23 08:42:34 +0100},
date-modified = {2010-02-23 08:42:37 +0100},
doi = {10.1016/j.jclinepi.2009.06.012},
pii = {S0895-4356(09)00207-8},
pmid = {19766455},
local-url = {file://localhost/Users/chl/Dropbox/Papers/van%20Nispen-2010-Journal%20of%20Clinical%20Epidemiology_A%20multilevel%20item%20re-1.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p6519},
rating = {4}
}

@article{Linting:2010p1671,
author = {M Linting and J J Meulman and P J F Groenen and A J Van der Kooij},
journal = {Psychological Methods},
title = {Nonlinear principal compo- nents analysis: Introduction and application},
date-added = {2010-01-08 22:17:16 +0100},
date-modified = {2010-01-08 22:18:40 +0100},
local-url = {file://localhost/Users/chl/Dropbox/Papers/Linting--Psychological%20Methods_Nonlinear%20principal.pdf},
uri = {papers://58407365-8DEB-4C7D-995B-6322E39C7022/Paper/p1671},
rating = {0}
}

@article{Lai:2006,
author = {Jin-Shei Lai and Paul K Crane and David Cella},
journal = {Qual Life Res},
title = {Factor analysis techniques for assessing sufficient unidimensionality of cancer related fatigue.},
abstract = {BACKGROUND: Fatigue is the most common unrelieved symptom experienced by people with cancer. The purpose of this study was to examine whether cancer-related fatigue (CRF) can be summarized using a single score, that is, whether CRF is sufficiently unidimensional for measurement approaches that require or assume unidimensionality. We evaluated this question using factor analysis techniques including the theory-driven bi-factor model. METHODS: Five hundred and fifty five cancer patients from the Chicago metropolitan area completed a 72-item fatigue item bank, covering a range of fatigue-related concerns including intensity, frequency and interference with physical, mental, and social activities. Dimensionality was assessed using exploratory and confirmatory factor analysis (CFA) techniques. RESULTS: Exploratory factor analysis (EFA) techniques identified from 1 to 17 factors. The bi-factor model suggested that CRF was sufficiently unidimensional. CONCLUSIONS: CRF can be considered sufficiently unidimensional for applications that require unidimensionality. One such application, item response theory (IRT), will facilitate the development of short-form and computer-adaptive testing. This may further enable practical and accurate clinical assessment of CRF.},
affiliation = {Center on Outcomes, Research and Education, Evanston Northwestern Healthcare and Northwestern University, 1001 University Place, Suite 100, 60201 Evanston, IL, USA. js-lai@northwestern.edu [corrected]},
number = {7},
pages = {1179--1190},
volume = {15},
year = {2006},
month = {Sep},
language = {eng},
date-added = {20

repository: sergiud/bibtex-spirit

repo_name: sergiud/bibtex-spirit

gha_license_id: MIT