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Power calculation for binary secondary outcomes
| Outcome | Expected proportion in control group | Clinically relevant proportion in intervention group | α | Power | Test | Reference |
|---|---|---|---|---|---|---|
| Proportion achieving > 4 weeks of ordinary job | 0.65 | 0.80 | 0.0167 | 0.838 | χ2 test | [71, 83] |
| Proportion of > 4 weeks recurrent sick leave absence among participants who returned to work | 0.19 | 0.08 | 0.0167 | 0.801 | χ2 test | [84] |
