From: Are alcoholism treatments effective? The Project MATCH data
Total Improvement | Â | Â | Â | Â | Â | |||
---|---|---|---|---|---|---|---|---|
 | Percent days abstinent |  |  |  |  |  | ||
 |  | Group | Pretreatment | Follow-up | t= | df | p= | Effect |
 |  | 0 | 33 | 72 | 1.95 | 85 | .000 | 1.498 |
 |  | 1 | 29 | 64 | 9.30 | 105 | .000 | 1.320 |
 |  | 12 | 30 | 86 | 31.74 | 354 | .000 | 2.042 |
 | Drinks per drinking day |  |  |  |  |  | ||
 |  | 0 | 17.9 | 7.3 | 1.75 | 85 | .000 | 1.534 |
 |  | 1 | 22.8 | 7.6 | 11.99 | 105 | .000 | 1.552 |
 |  | 12 | 15.7 | 3.2 | 34.68 | 354 | .000 | 2.494 |
Instantaneous Improvement (week 1) | Â | Â | Â | Â | Â | |||
 | Percent days abstinent |  |  |  |  |  | ||
 |  | Group | Pretreatment | Week 1 | t= | df | p= | Effect |
 |  | 0 | 32 | 81 | 9.17 | 56 | .000 | 1.981 |
 |  | 1 | 30 | 69 | 8.43 | 87 | .000 | 1.447 |
 |  | 12 | 30 | 92 | 35.30 | 339 | .000 | 2.317 |
 | Drinks per drinking day |  |  |  |  |  | ||
 |  | 0 | 18.7 | 3.8 | 1.75 | 56 | .000 | 2.097 |
 |  | 1 | 22.5 | 8.7 | 9.69 | 87 | .000 | 1.770 |
 |  | 12 | 15.6 | 1.5 | 35.28 | 339 | .000 | 2.909 |
Acute Treatment Phase (weeks 1 & 12) | Â | Â | Â | Â | Â | |||
 | Percent days abstinent |  |  |  |  |  | ||
 |  | Group | Week 1 | Week 12 | t= | df | p= | Effect |
 |  | 0 | 81 | 81 | .19 | 56 | .852 | -.025 |
 |  | 1 | 69 | 63 | 1.69 | 87 | .098 | -.174 |
 |  | 12 | 92 | 96 | 2.82 | 339 | .005 | .155 |
 | Drinks per drinking day |  |  |  |  |  | ||
 |  | 0 | 3.8 | 5.0 | 1.08 | 56 | .283 | -.172 |
 |  | 1 | 8.7 | 8.8 | .82 | 87 | .415 | -.090 |
 |  | 12 | 1.5 | 1.1 | 2.05 | 339 | .041 | .126 |