N = 2(0.84 + 1.96)2 * (σ/§)2 | ||
---|---|---|
σ = standard deviation of the primary outcome (Depression, Anxiety, Stress subscales of DASS21) | ||
§ = minimal clinically important difference | ||
Depression subscale | Anxiety subscale | Stress subscale |
N = 2(0.84 + 1.96)2 * (σ/§)2 | N = 2(0.84 + 1.96)2 * (σ/§)2 | N = 2(0.84 + 1.96)2 * (σ/§)2 |
N = 2(0.84 + 1.96)2 * (5.4/4)2 | N = 2(0.84 + 1.96)2 *(10.2/4)2 | N = 2(0.84 + 1.96)2 * (8.6/4)2 |
N = 28.6 per group | N = 102 per groupa | N = 72.5 per group |