Power evaluations for family-based tests of association with incomplete parental genotypes.

Abstract:

:While a variety of methods have been developed to deal with incomplete parental genotype information in family-based association tests, sampling design issues with incomplete parental genotype data still have not received much attention. In this article, we present simulation studies with four genetic models and various sampling designs and evaluate power in family-based association studies. Efficiency depends heavily on disease prevalence. With rare diseases, sampling affecteds and their parents is preferred, and three sibs will be required to have close power if parents are unavailable. With more common diseases, sampling affecteds and two sibs will generally be more efficient than trios. When parents are unavailable, siblings need not be phenotyped if the disease is rare, but a loss of power will result with common diseases. Finally, for a class of complex traits where other genetic and environmental factors also cause phenotypic correlation among siblings, little loss of efficiency occurs to rare disease, but substantial loss of efficiency occurs to common disease.

journal_name

Genetics

journal_title

Genetics

authors

Yang Q,Xu X,Laird N

keywords:

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

399-406

issue

1

eissn

0016-6731

issn

1943-2631

journal_volume

164

pub_type

杂志文章

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