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  Vol. 142 No. 6, June 2006 TABLE OF CONTENTS
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  Evidence-Based Dermatology: Review
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The (Relative) Risks of Using Odds Ratios

Kenneth A. Katz, MD, MSc

Arch Dermatol. 2006;142:761-764.

Odds ratios are commonly presented in the medical literature, including dermatology journals. Even when used appropriately, odds ratios are often difficult to interpret. This article illustrates this problem using an example from the recent dermatology literature. It then reviews the definitions of odds and odds ratio, as well as how odds and odds ratio relate to probability and relative risk. The divergence of odds ratios from relative risks when events are common (occurring in ≥10% of a sample) is explained. Methods to convert odds ratios to relative risks (and the reasons why conversion should be considered) are discussed.


Author Affiliation: Department of Dermatology, University of Pennsylvania School of Medicine, Philadelphia.


RELATED ARTICLE

Errors in the Archives of Dermatology and the Journal of the American Academy of Dermatology From January Through December 2003
Julie A. Neville, Wei Lang, and Alan B. Fleischer, Jr
Arch Dermatol. 2006;142(6):737-740.
ABSTRACT | FULL TEXT  


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES

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What Are the Odds?
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Ann. Thorac. Surg. 2007;83:1240-1244.
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Errors in the archives of dermatology and the journal of the american academy of dermatology from january through december 2003.
Neville et al.
Arch Dermatol 2006;142:737-740.
ABSTRACT | FULL TEXT  





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