Field
Power calculation: Minimum Detectable Effect Size for Main Outcomes
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Before
Binary outcomes, all treatment arms vs. control: 2.9 percentage points (assuming no power gain from stratification and statistical controls), 1.5 percentage points (assuming 75% reduction in variance from stratification and statistical controls)
Binary outcomes, arm vs. arm: 3.6 percentage points (no power gain), 1.8 percentage points (75% reduction in variance)
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After
Primary outcome 1 (number of patients with co-prescriptions)
- MDE, arm-to-arm comparison: 0.19 patients (4.5% of mean)
- MDE, all interventional arms vs. control: 0.15 patients (3.7% of mean)
Primary outcome 2 (indicator for checking the PMP)
- MDE, arm-to-arm comparison: 2.2 percentage points (4.6% of mean)
- MDE, all interventional arms vs. control: 1.8 percentage points (3.7% of mean)
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