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Am J Epidemiol. 2009 Oct 15;170(8):957-8. doi: 10.1093/aje/kwp292. Epub 2009 Sep 15.

The association of body mass index with health outcomes: causal, inconsistent, or confounded?

Author information

1
Division of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, The University of Arizona, Tucson, AZ 85724, USA. shahar@email.arizona.edu

Abstract

According to the definition of confounding in a causal diagram, the association of body mass index (weight (kg)/height (m)(2)) with health-related outcomes is almost always noncausal, attributable to confounding by weight and perhaps height. The same conclusion holds for any other deterministic derivation from weight and height. No causal knowledge is gained by estimating a nonexistent effect of body mass index.

PMID:
19755631
DOI:
10.1093/aje/kwp292
[Indexed for MEDLINE]

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