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Abstinence by assessment × treatment condition
| E-ISI | STC | ||||
|---|---|---|---|---|---|
| n | % | n | % | ||
| 3 months (n = 164) | |||||
| Relapsed | 71 | 86.6 | 79 | 96.3 | p = .0254 |
| Abstinent | 11 | 13.4 | 3 | 3.7 | |
| 6 months (n = 162) | |||||
| Relapsed | 73 | 89.0 | 71 | 88.8 | p = .9557 |
| Abstinent | 9 | 11.0 | 9 | 11.3 | |
| 12 months (n = 159) | |||||
| Relapsed | 75 | 93.8 | 69 | 87.3 | p = .1669 |
| Abstinent | 5 | 6.3 | 10 | 12.7 | |
| 18 months (n = 156) | |||||
| Relapsed | 66 | 83.5 | 66 | 85.7 | p = .7072 |
| Abstinent | 13 | 16.5 | 11 | 14.3 | |
Abbreviations: E-ISI, extended innovative system intervention STC, standard treatment control.
