| Continuous abstinence at 3 months | ||
| Frequency | % | |
| No | 143 | 51.4 |
| Yes | 135 | 48.6 |
| Total | 278 | 100.0 |
| Continuous abstinence at 6 months | ||
| Frequency | % | |
| No | 183 | 65.8 |
| Yes | 95 | 34.2 |
| Total | 278 | 100.0 |
| Continuous abstinence at 9 months | ||
| Frequency | % | |
| No | 197 | 70.9 |
| Yes | 81 | 29.1 |
| Total | 278 | 100.0 |
| Continuous abstinence at 12 months=Treatment success | ||
| Frequency | % | |
| No | 201 | 72.3 |
| Yes | 77 | 27.7 |
| Total | 278 | 100.0 |