Variance estimation of allele-based odds ratio in ... Catalogue en ligne

Titre :	Variance estimation of allele-based odds ratio in the absence of Hardy-Weinberg equilibrium. (2008)
Auteurs :	ZINTZARAS (Elias) : USA. The Institute for Clinical Research and Health Policy Studies. Tufts Medical Center. Tufts Universtiy School of Medicine. Boston. MA.
Type de document :	Article
Dans :	European journal of epidemiology (vol. 23, n° 5, 2008)
Pagination :	323-326
Langues:	Anglais
Mots-clés :	Méthodologie ; Méthode ; Enquête cas témoin ; Homme ; Epidémiologie ; Risque relatif
Résumé :	[BDSP. Notice produite par INIST-CNRS AImlR0x9. Diffusion soumise à autorisation]. In gene-disease association studies, deviation from Hardy-Weinberg equilibrium in controls may cause bias in estimating the allele-based estimates of genetic effects. An approach to adjust the variance of allele-based odds ratio for Hardy-Weinberg equilibrium deviation is proposed. Such adjustments have been introduced for estimating relative risks of genotype contrasts and differences in allele frequency ; however, an adjustment of odds ratios for allele frequencies still does not exist. The approach was based on the delta method in combination with the Woolf's logit interval method and the disequilibrium coefficient. The proposed variance adjustment provided better power than the unadjusted one to detect significant estimates of odds ratio and it improved the variance estimation.

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