Convert odds ratio to risk ratio (Zhang-Yu)
Approximates a risk ratio from an adjusted odds ratio and the control-group risk.
Inputs
0 of 2%
When to use
- A study reports an odds ratio for a common outcome.
Pearls and pitfalls
- Applying the formula to confidence limits gives approximate intervals.
Why use
Odds ratios exaggerate effects when outcomes are common.
RR = OR ÷ (1 − P₀ + P₀ × OR)