Estimating Missing Heritability for Disease from Genome-wide Association Studies

Overview

Journal Am J Hum Genet

Publisher Cell Press

Specialty Genetics

Date 2011 Mar 8

PMID 21376301

Citations 619

Authors

Sang Hong Lee

Naomi R Wray

Michael E Goddard

Peter M Visscher

Affiliations

Soon will be listed here.

Abstract

Genome-wide association studies are designed to discover SNPs that are associated with a complex trait. Employing strict significance thresholds when testing individual SNPs avoids false positives at the expense of increasing false negatives. Recently, we developed a method for quantitative traits that estimates the variation accounted for when fitting all SNPs simultaneously. Here we develop this method further for case-control studies. We use a linear mixed model for analysis of binary traits and transform the estimates to a liability scale by adjusting both for scale and for ascertainment of the case samples. We show by theory and simulation that the method is unbiased. We apply the method to data from the Wellcome Trust Case Control Consortium and show that a substantial proportion of variation in liability for Crohn disease, bipolar disorder, and type I diabetes is tagged by common SNPs.

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