The Janus face of statistical adjustment : confoun... Catalogue en ligne

Titre :	The Janus face of statistical adjustment : confounders versus colliders. (2010)
Auteurs :	Imre JANSZKY ; AHLBOM (Anders) : SWE. Institute of Environmental Medicine. Karolinska Institute. Stockholm. ; SVENSSON (Anna-C) : SWE. Department of Public Health Sciences. Karolinska Institutet. Norrbacka. Stockholm.
Type de document :	Article
Dans :	European journal of epidemiology (vol. 25, n° 6, 2010)
Pagination :	361-363
Langues:	Anglais
Mots-clés :	Visage ; Statistique ; Etude comparée ; Homme ; Epidémiologie ; Biais
Résumé :	[BDSP. Notice produite par INIST-CNRS lCrr8R0x. Diffusion soumise à autorisation]. It has long been established that controlling for confounders is essential to delineate the causal relationship between exposure and disease. For this purpose, statistical adjustment is widely used in observational studies. However, many researchers don't acknowledge the potential pitfalls of statistical adjustment. The aim of the present paper was to demonstrate that statistical adjustment is a double edged sword. By using numerically identical examples, we show that adjustment for a common consequence of the exposure and the outcome can lead to as much bias as absence of necessary adjustment for a confounder.

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