Calculation and Conversion of Effect Measures


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Possible (approximate) conversion relationships between different effect measures

Note: This page provides a summary of some conversion processes only. For more calculations and conversions, please refer to the navigation menu on the left.

The blue section represents effect measures for continuous outcomes, while the yellow section represents those for categorical or time-to-event outcomes. When performing cross-domain conversions, ensure that prerequisite assumptions are met.

How to use

Order Path Order Path
1 Click here, for scenario 1 2 Click here, for scenario 1
3 Click here, for scenario 3 4 Click here, for scenario 3
5 Click here 6 Click here
7 Click here 8 Click here
9 Calculate using incidence of control group (P) and the formula: RD=RR*P-P 10 Calculate using incidence of control group (P) and the formula:RR=(RD+P)/P
11 Click here 12 Click here
13 Click here, only for pre-post design.