Health Services Research (HSR) Methods
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Absolute Risk Reduction (ARR)

Compares the probability of an outcome in the control group with the treatment group.


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.