Table 4 Simulated trial operating characteristics
From: Assessment of DHA on reducing early preterm birth: the ADORE randomized controlled trial protocol
Scenario | %. | %. | Power | Mean | Mean trial | ||
|---|---|---|---|---|---|---|---|
Finish | Finish | Subjects | % Group 1 | % Group 2 | (Weeks) | ||
Early | Late | ||||||
#1. very likely (4 vs 1%)a | 82% | 8% | 90% | 938 | 40% | 60% | 184 |
#2. likely (3 vs 0.5%) | 84% | 7% | 91% | 934 | 41% | 59% | 184 |
#3. unlikely (3 vs 1%) | 52% | 11% | 63% | 1046 | 44% | 56% | 204 |
#4. very unlikely (3 vs 2%) | 23% | 4% | 27% | 1142 | 46% | 54% | 221 |
#5. no difference (3 vs 3%) | 5% | 0% | 5% | 1188 | 51% | 49% | 231 |