Case-control studies of gene-environment interaction: Bayesian design and analysis.

Case-control studies of gene-environment interaction: Bayesian design and analysis.
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DOI:
10.1111/j.1541-0420.2009.01357.x
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发表时间:
2010-09
期刊:
影响因子:
1.9
通讯作者:
Chatterjee N
Chatterjee N
中科院分区:
数学3区
文献类型:
--
作者:
Mukherjee B;Ahn J;Gruber SB;Ghosh M;Chatterjee N

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With increasing frequency, epidemiologic studies are addressing hypotheses regarding gene-environment interaction. In many well studied candidate genes and for standard dietary and behavioral epidemiologic exposures, there is often substantial prior information available which may be used to analyze current data as well as for designing a new study. In this paper, first, we propose a proper full Bayesian approach for analyzing studies of gene-environment interaction. The Bayesian approach provides a natural way to incorporate uncertainties around the assumption of gene-environment independence, often used in such analysis. We then consider Bayesian sample size determination criteria for both estimation and hypothesis testing regarding the multiplicative gene-environment interaction parameter. We illustrate our proposed methods using data from a large ongoing case-control study of colorectal cancer investigating the interaction of N-acetyl transferase type 2 (NAT2) with smoking and red meat consumption. We use the existing data to elicit a design prior and show how to use this information in allocating cases and controls in planning a future study which investigates the same interaction parameters. The Bayesian design and analysis strategies are compared with their corresponding frequentist counterparts.
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