Implications of measurement error in exposure for the sample sizes of case-control studies.
In this paper, recent results describing the effects of measurement error on estimation of the association between an exposure and a disease are applied to sample size calculation in case-control studies.
Models of the relation between true exposure and a surrogate exposure measure assessed with error are used to derive equations for sample size determination.
The results show that the sample size of a study based on an exposure variable which is measured with error must be larger by a factor of 1/rhô2 than if exposure were measured without error, where rhô is the correlation between the true exposure and the surrogate exposure measure.
Mots-clés Pascal : Epidémiologie, Méthodologie, Erreur mesure, Régime alimentaire, Nutrition, Maladie, Echantillonnage, Analyse statistique, Etude cas témoin
Mots-clés Pascal anglais : Epidemiology, Methodology, Measurement error, Diet, Nutrition, Disease, Sampling, Statistical analysis, Case control study
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0280593
Code Inist : 002B30A01A1. Création : 199406.