Health Services Research (HSR) Methods
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Relative Risk (RR)
Synonyms: Risk Ratio

A measure of the association between exposure to a risk factor and development of a disease. A measure of relative risk indicates the number of times more or less likely an individual is to contract a disease when exposed to the risk factor versus being unexposed.


Further Reading
Berger, M. et al. 2003. Health Care, Cost, Quality, and Outcomes: ISPOR Book of Terms, Lawrenceville, NJ: International Society for Pharmacoeconomics and Outcomes Research.

Gordis, L. 2000. Epidemiology, 2nd ed., Philadelphia, PA: Elsevier Science.