Conversion of relative effect (RE) after swapping comparison groups

Relative effect of A vs. B obtained from literature

Relative effect
Lower Limit
Upper Limit

Estimated relative effect of B vs. A

Reverse relative effect
Lower Limit
Upper Limit

Formula: $$RE_{rev}=\frac{1}{RE} $$

For example: if males are the control group and females are the exposed group, and the literature reports the OR (95% CI) for females as 0.48 (0.36, 0.65).
Input: 0.48, 0.36, 0.65
Click to calculate
The OR (95% CI) for males is 2.08 (1.54, 2.78)

Reference:

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