In many case-control studies the risk factors are categorized in order to clarify the analysis and presentation of the data.
However, inconsistent categorization of continuous risk factors may make interpretation difficult.
This paper attempts to evaluate the effect of the categorization procedure on the odds ratio and several measures of association.
Often the risk factor is dichotomized and the data linking the risk factor and the disease is presented in a 2 x 2 table.
We show that the odds ratio obtained from the 2 x 2 table is usually considerably larger than the comparable statistic that would have been obtained had a large number of cutpoints been used.
Mots-clés Pascal : Facteur risque, Association, Catégorisation, Classification croisée, Résultat, Méthodologie, Analyse statistique, Odds ratio, Donnée ordinale, Etude cas témoin, Epidémiologie
Mots-clés Pascal anglais : Risk factor, Association, Categorization, Cross classification, Result, Methodology, Statistical analysis, Case control study, Epidemiology
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0416922
Code Inist : 002B30A01A1. Création : 199406.