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  1. Use of relatives of cases as controls to identify risk factors when an interaction between environmental and genetic factors exists.

    Article - En anglais

    Background

    The difficulty in detecting relevant risk factors for chronic diseases (such as breast and colon cancer) may be due to heterogeneity in the populations of studied cases, and one source of heterogeneity may be differential genetic susceptibility predisposing to differential environmental sensitivity.

    Method

    The purpose of this investigation is to determine whether the estimates of odds ratios are modified by using relatives as controls when risk factors interact with an underlying genetic factor.

    Results

    We demonstrate that using relative controls in matched case-control studies produces odds ratios different from population-based odds ratios.

    This difference is dependent on the amount of interaction between the genetic and environmental factors and on the genetic correlation between relatives.

    Conclusion

    In the case of a common disease, the use of relatives as controls could be helpful in detecting interaction between an exposure and an underlying genetic factor when the genetic factor is common.

    Mots-clés Pascal : Epidémiologie, Méthodologie, Milieu familial, Déterminisme génétique, Homme, Modèle statistique, Facteur risque, Groupe témoin, Etude cas témoin

    Mots-clés Pascal anglais : Epidemiology, Methodology, Family environment, Genetic inheritance, Human, Statistical model, Risk factor, Case control study

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 96-0318433

    Code Inist : 002B30A01A1. Création : 10/04/1997.