Table 2 Statistical powers provided by a sample size of n = 42 (21 per group) if two lesions are evaluable per subject
Effect size (between-group difference) | 1.0 mm | |||||
|---|---|---|---|---|---|---|
Standard deviation | 1.1 mm | 1.3 mm | ||||
Intra-subject correlation | 0.1 | 0.3 | 0.5 | 0.1 | 0.3 | 0.5 |
Statistical power | 97.1% | 94.5% | 91.5% | 90.8% | 85.8% | 80.1% |