|  | Trial with 80% power | Trial with 90% power |
---|---|---|---|
% prolonged abstinence in control | % prolonged abstinence in intervention | Number/arm | Number/arm |
RR = 1.3 |  |  |  |
14 | 18.2 | 1249 | 1655 |
15 | 19.5 | 1150 | 1524 |
16 | 20.8 | 1064 | 1409 |
20 | 26 | 805 | 1065 |
RR = 1.4 |  |  |  |
14 | 19.6 | 734 | 970 |
15 | 21 | 676 | 893 |
16 | 22.4 | 625 | 825 |
20 | 28 | 471 | 622 |
RR = 1.5 |  |  |  |
14 | 21 | 490 | 646 |
15 | 22.5 | 451 | 594 |
16 | 24 | 416 | 549 |
20 | 30 | 313 | 412 |