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Health Economics Wiki
Statistical Methodsevidence: highv1.0.0

Relative Risk

The ratio of the probability of an event in the exposed group to the probability in the unexposed group.

Definition

Relative risk (RR), also called risk ratio, is used to compare event rates between treatment and control groups. In health economic models, relative risks from clinical trials are applied to baseline event rates to derive treatment-specific transition probabilities. An RR < 1 indicates the treatment reduces the risk of the event.

Canonical Identity

Version
1.0.0
Published
4/26/2026
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