S R SeamanSummaryAffiliation: University of Cambridge Country: UK Publications
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Publications
A Bayesian partition model for case-control studies on highly polymorphic candidate genesS R Seaman
MRC Biostatistics Unit, Institute of Public Health, Cambridge, England
Genet Epidemiol 22:356-68. 2002..The partition model enables genotype risks to be estimated more accurately and the alleles to be ranked according to risk...
Multiple imputation of missing covariates with non-linear effects and interactions: an evaluation of statistical methodsShaun R Seaman
MRC Biostatistics Unit, Institute of Public Health, Cambridge CB2 0SR, UK
BMC Med Res Methodol 12:46. 2012..In 'passive imputation' a value X* is imputed for X and then X2 is imputed as (X*)2. A recent proposal is to treat X2 as 'just another variable' (JAV) and impute X and X2 under multivariate normality...
Combining multiple imputation and inverse-probability weightingShaun R Seaman
MRC Biostatistics Unit, Cambridge, UK
Biometrics 68:129-37. 2012..IPW/MI is applied to data from the National Child Development Study...
Doubly robust generalized estimating equations for longitudinal dataShaun Seaman
Institute of Public Health, Robinson Way, Cambridge CB2 0SR, UK
Stat Med 28:937-55. 2009..We describe DR GEE, and illustrate their use on simulated data. We also analyse the INITIO randomized clinical trial of HIV therapy allowing for MAR dropout...
Mortality from overdose among injecting drug users recently released from prison: database linkage studyS R Seaman
Medical Research Council Biostatistics Unit, Institute of Public Health, Cambridge
BMJ 316:426-8. 1998..5 (1.7 to 11.7) for death from overdose. After temporal matching these risks became 1.8 (0.4 to 9.2). CONCLUSION: Prisons should evaluate interventions to reduce the risk of death from overdose after release...
Rapid simulation of P values for product methods and multiple-testing adjustment in association studiesS R Seaman
Max Planck Institute of Psychiatry, Munich, Germany
Am J Hum Genet 76:399-408. 2005..We demonstrate the accuracy of the DSA on real and simulated data and illustrate how it might be used in the analysis of a whole-genome association study...
Multiple Sclerosis Severity Score: using disability and disease duration to rate disease severityR H S R Roxburgh
Neurology Department, Cambridge University, UK
Neurology 64:1144-51. 2005..There is no consensus method for determining progression of disability in patients with multiple sclerosis (MS) when each patient has had only a single assessment in the course of the disease...
Effect of genotyping error on type-I error rate of affected sib pair studies with genotyped parentsS R Seaman
Max Planck Institute of Psychiatry, Munich, Germany
Hum Hered 59:157-64. 2005..The effect of genotyping error when parents have been genotyped is unknown. We investigated the type I error rate of the single-point Mean test for studies in which genotypes of both parents are available...
Familial effects on the clinical course of multiple sclerosisA E Hensiek
Department of Clinical Neuroscience, University of Cambridge Clinical School, Addenbrooke s Hospital, Box 165, Cambridge CB2 2QQ, UK
Neurology 68:376-83. 2007..Familial factors influence susceptibility to multiple sclerosis (MS) but it is unknown whether there are additional effects on the natural history of the disease...
