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Human Genome Epidemiology, 2nd EditionBuilding the evidence for using genetic information to improve health and prevent disease$
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Muin Khoury, Sara Bedrosian, Marta Gwinn, Julian Higgins, John Ioannidis, and Julian Little

Print publication date: 2009

Print ISBN-13: 9780195398441

Published to Oxford Scholarship Online: May 2010

DOI: 10.1093/acprof:oso/9780195398441.001.0001

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Case-control and cohort studies in the age of genome-wide associations

Case-control and cohort studies in the age of genome-wide associations

(p.100) 6 Case-control and cohort studies in the age of genome-wide associations
Human Genome Epidemiology, 2nd Edition

Teri Manolio

Oxford University Press

Environmental modifiers of the effects of genetic variants, or gene-environment interactions, have received increased attention in recent years due to the recognition that genetic variants alone are unlikely to explain most of the recent increases in chronic diseases. Such increases are more likely due to environmental and behavioral changes interacting with a genetic predisposition, suggesting that failing to identify and control environmental modifiers of disease risk could mask important associations with genetic variants or misestimate the magnitude of their effects. Identifying environmental modifiers of these variants may also be essential in mitigating the risk conferred by these variants. Population-based genetic association studies with detailed characterization of environmental exposures are critical and underused resources for identifying potential interacting factors. This chapter explores the substantial and complementary strengths offered by the two main approaches to these studies — case-control and cohort designs — in the search for the genetic and environmental influences on common diseases.

Keywords:   case-control studies, cohort studies, environmental influences, genome-wide association studies, population-based studies

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