Month | Continuous abstinence | P | |
---|---|---|---|
Intervention group | Control group | ||
(n = 1377) | (n = 1230) | ||
6 | 79(5.7%) | 3(0.2%) | <0.001 |
12 | 198(14.4%) | 11(0.9%) | <0.001 |
18 | 342(24.8%) | 24(2.0%) | <0.001 |
24 | 508(36.9%) | 36(2.9%) | <0.001 |
30 | 639(46.4%) | 42(3.4%) | <0.001 |
36 | 630(45.8%) | 49(4.0%) | <0.001 |
42 | 622(45.2%) | 57(4.6%) | <0.001 |
48 | 610(44.3%) | 63(5.1%) | <0.001 |