Efficient designs of gene-environment interaction studies: implications of Hardy-Weinberg equilibrium and gene-environment independence.
Efficient designs of gene-environment interaction studies: implications of Hardy-Weinberg equilibrium and gene-environment independence.
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DOI:
10.1002/sim.4460
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发表时间:
2012-09-28
影响因子:
2
通讯作者:
Mukherjee, Bhramar
中科院分区:
文献类型:
--
作者:
Chen, Jinbo;Kang, Guolian;VanderWeele, Tyler;Zhang, Cuilin;Mukherjee, Bhramar
关键词:
It is important to investigate whether genetic susceptible variants exercise the same effects in populations that are differentially exposed to environmental risk factors. Here, we assess the power of four two-phase case-control design strategies for assessing multiplicative gene-environment (G-E) interactions or for assessing genetic or environmental effects in the presence of G-E interactions. With a di-allelic SNP and a binary E, we obtained closed-form maximum likelihood estimates of both main effect and interaction odds ratio parameters under the constraints of G-E independence and Hardy-Weinberg Equilibrium, and used the Wald statistic for all tests. We concluded that i) for testing G-E interactions or genetic effects in the presence of G-E interactions when data for E is fully available, it is preferable to ascertain data for G in a subsample of cases with similar numbers of exposed and unexposed and a random subsample of controls; and ii) for testing G-E interactions or environmental effects in the presence of G-E interactions when data for G is fully available, it is preferable to ascertain data for E in a subsample of cases that has similar numbers for each genotype and a random subsample of controls. In addition, supplementing external control data to an existing casecontrol sample leads to improved power for assessing effects of G or E in the presence of G-E interactions.
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影响因子:
2
作者:
PIEGORSCH, WW;WEINBERG, CR;TAYLOR, JA
通讯作者:
TAYLOR, JA
影响因子:
3.7
作者:
SATTEN, GA;KUPPER, LL
通讯作者:
KUPPER, LL
影响因子:
2.1
作者:
Mukherjee, Bhramar;Ahn, Jaeil;Chatterjee, Nilanjan
通讯作者:
Chatterjee, Nilanjan
DOI:
10.1038/nrg2764
发表时间:
2010-04
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
--
影响因子:
1.9
作者:
Sasieni, PD
通讯作者:
Sasieni, PD