Biostatistics Advance Access originally published online on March 23, 2006
Biostatistics 2007 8(1):32-52; doi:10.1093/biostatistics/kxj030
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Bayesian logistic regression using a perfect phylogeny
Department of Statistics, University of Oxford, Oxford, UK and Department of Epidemiology and Public Health, Imperial College, London, UK taane.clark{at}imperial.ac.uk
Department of Epidemiology and Public Health, Imperial College, London
Department of Statistics, University of Oxford, Oxford
* To whom correspondence should be addressed.
Haplotype data capture the genetic variation among individuals in a population and among populations. An understanding of this variation and the ancestral history of haplotypes is important in genetic association studies of complex disease. We introduce a method for detecting associations between disease and haplotypes in a candidate gene region or candidate block with little or no recombination. A perfect phylogeny demonstrates the evolutionary relationship between single-nucleotide polymorphisms (SNPs) in the haplotype blocks. Our approach extends the logic regression technique of Ruczinski and others (2003) to a Bayesian framework, and constrains the model space to that of a perfect phylogeny. Environmental factors, as well as their interactions with SNPs, may be incorporated into the regression framework. We demonstrate our method on simulated data from a coalescent model, as well as data from a candidate gene study of sarcoidosis.
Keywords: Gene tree; Gibbs sampling; Haplotype association; Logic regression; SNP data
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