Research Topics
| Liam M O'BrienSummaryAffiliation: Colby College Country: USA Publications
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Detail Information
Publications
Statistical adjustments for brain size in volumetric neuroimaging studies: some practical implications in methodsLiam M O'Brien
Department of Mathematics and Statistics, Colby College, Waterville, ME 04901, USA
Psychiatry Res 193:113-22. 2011....
Impact of a school health coordinator intervention on health-related school policies and student behaviorLiam M O'Brien
Department of Mathematics, Colby College, 5838 Mayflower Hill, Waterville, ME 04901, USA
J Sch Health 80:176-85. 2010..This study evaluates the impact of the Healthy Maine Partnerships SHC (HMPSHC) intervention on school policies and student risk behaviors after its first 5 years...- Regression models for the analysis of longitudinal Gaussian data from multiple sourcesLiam M O'Brien
Department of Mathematics, Colby College, 5838 Mayflower Hill, Waterville, ME 04901, USA
Stat Med 24:1725-44. 2005..The methods are illustrated with an example of multiple informant data arising from a longitudinal interventional trial in psychiatry... - Maximum likelihood estimation of marginal pairwise associations with multiple source predictorsLiam M O'Brien
Department of Mathematics, Colby College, 5838 Mayflower Hill, Waterville, ME 04901, USA
Biom J 48:860-75. 2006..We also explore the asymptotic relative efficiency of ML and GEE methods in this setting... 
Regression analysis of multiple source and multiple informant data from complex survey samplesNicholas J Horton
Department of Mathematics, Smith College, College Lane, Northampton, MA 01063, USA
Stat Med 23:2911-33. 2004..Finally, the methods are illustrated using data from two studies: the Stirling County Study and the Eastern Connecticut Child Survey...- A marginalized pattern-mixture model for longitudinal binary data when nonresponse depends on unobserved responsesKenneth J Wilkins
Department of Biostatistics, Harvard School of Public Health, Boston, MA 02115, USA
Biostatistics 8:297-305. 2007..The paper concludes with application of the method to data from a contraceptive clinical trial with substantial dropout... - A simple imputation method for longitudinal studies with non-ignorable non-responsesMolin Wang
Department of Biostatistics, Harvard School of Public Health, Boston, MA 02115, USA
Biom J 48:302-18. 2006..An appealing feature of the proposed method is that it can be readily implemented using existing, widely-available statistical software. The method is illustrated using longitudinal data on obesity from the MCRF study... - A hybrid model for nonignorable dropout in longitudinal binary responsesKenneth J Wilkins
Department of Biostatistics, Harvard School of Public Health, 655 Huntington Avenue, Boston, Massachusetts 02115, USA
Biometrics 62:168-76. 2006..The article concludes by applying the approach to data from a randomized clinical trial comparing two doses of a contraceptive... - Estimation in regression models for longitudinal binary data with outcome-dependent follow-upGarrett M Fitzmaurice
Department of Biostatistics, Harvard School of Public Health, 655 Huntington Avenue and Brigham and Women s Hospital, Boston, MA, USA
Biostatistics 7:469-85. 2006..Finally, we illustrate the main results using data from a longitudinal observational study that explored the cardiotoxic effects of doxorubicin chemotherapy for the treatment of acute lymphoblastic leukemia in children... - Pseudo-likelihood methods for longitudinal binary data with non-ignorable missing responses and covariatesMichael Parzen
Department of Decision and Information Analysis, Goizueta Business School, USA
Stat Med 25:2784-96. 2006..to handle binary responses and possibly missing time-varying covariates. The method is illustrated using data from the Six Cities study, a longitudinal study of the health effects of air pollution... - Parameter estimation in longitudinal studies with outcome-dependent follow-upStuart R Lipsitz
Department of Biometry and Epidemiology, Medical University of South Carolina, Charleston 29425, USA
Biometrics 58:621-30. 2002..1995, New England Journal of Medicine 332, 1738-1743) that explored the cardiotoxic effects of doxorubicin chemotherapy for the treatment of acute lymphoblastic leukemia in children... - A pattern-mixture model for longitudinal binary responses with nonignorable nonresponseJolene Birmingham
Department of Biostatistics, Harvard School of Public Health, 655 Huntington Avenue, Boston, Massachusetts 02115, USA
Biometrics 58:989-96. 2002..The methodology is illustrated using data from a longitudinal study of obesity in children... - Simple adjustments for randomized trials with nonrandomly missing or censored outcomes arising from informative covariatesStuart G Baker
Biometry Research Group, Division of Cancer Prevention, National Cancer Institute, Bethesda, MD, USA
Biostatistics 7:29-40. 2006..We discuss the computations for univariate, survival, and longitudinal outcomes, and present an application involving a randomized study of dual versus triple combinations of HIV-1 reverse transcriptase inhibitors... - Cognitive performance in childhood and early adult illness: a prospective cohort studyLaurie T Martin
Department of Epidemiology, Harvard School of Public Health, Boston, USA
J Epidemiol Community Health 58:674-9. 2004..To evaluate whether cognitive performance in childhood is an early determinant of adult illness... - Adolescent suicidal ideation as predictive of psychopathology, suicidal behavior, and compromised functioning at age 30Helen Z Reinherz
Simmons Longitudinal Study, Simmons College School of Social Work, 300 The Fenway, Boston, MA 02115, USA
Am J Psychiatry 163:1226-32. 2006.... - Trends in overweight from 1980 through 2001 among preschool-aged children enrolled in a health maintenance organizationJuhee Kim
Department of Society and Human Development and Health, Harvard School of Public Health, Boston, MA 02115, USA
Obesity (Silver Spring) 14:1107-12. 2006..To examine overweight trends over a 22-year period among preschool-aged children from primarily middle-income families enrolled in a health maintenance organization... - A note on permutation tests for variance components in multilevel generalized linear mixed modelsGarrett M Fitzmaurice
Harvard Medical School, Boston, MA, USA
Biometrics 63:942-6. 2007..Results from a simulation study suggest that it is more powerful than tests based on mixtures of chi-square distributions. The proposed test is illustrated using data on the familial aggregation of sleep disturbance... - Change in prevalence of psychiatric disorders from ages 21 to 30 in a community sampleJennifer L Tanner
Rutgers University, Institute for Health, Health Care Policy, and Aging Research, New Brunswick, New Jersey, USA
J Nerv Ment Dis 195:298-306. 2007..Results of this study have implications for mental health service planning in emerging adulthood... - To dichotomize or not to dichotomize?Caitlin Ravichandran
Laboratory for Psychiatric Biostatistics, McLean Hospital, Belmont, MA, USA
Nutrition 24:610-1. 2008 - Incidence and remission rates of overweight among children aged 5 to 13 years in a district-wide school surveillance systemJuhee Kim
Department of Nutrition, Harvard School of Public Health, Boston, MA 02115, USA
Am J Public Health 95:1588-94. 2005..To monitor annual changes in weight status, we determined incidence and remission rates of overweight among school-aged children with longitudinal school-based surveillance... - Socioeconomic status in childhood and the lifetime risk of major depressionStephen E Gilman
Department of Health and Social Behavior, Harvard School of Public Health, Boston, Massachusetts 02115, USA
Int J Epidemiol 31:359-67. 2002..In this study, we test the hypotheses that low childhood SES predicts an increased risk of adult depression and contributes to a higher risk of depression among females...