Table 2 Reasons for dropout and completion rates per condition
| Â | I-StoP | CBT-SUD+ | Overall | Â |
|---|---|---|---|---|
N = 25 | N = 24 | N = 49 | Between group analyses | |
| Â | N (%) | N (%) | N (%) | Â |
Reasons for drop-out | Â | Â | Â | Â |
Patients could not be contacted | 9 (36.0) | 10 (41.7) | 19 (38.8) | X2 (4) = 6.18; p = .19 |
Agreement treatment was no longer needed | 3 (12.0) | 0 (0.0) | 3 (6.1) | Â |
Did not want treatment anymore | 2 (8.0) | 4 (16.7) | 6 (12.2) | Â |
Needed different treatment | 0 (0.0) | 2 (8.3) | 2 (4.1) | Â |
No. of sessions attended–ITT M (S.D.) | 9.25 (6.54) | 8.68 (5.59) | 8.96 (6.02) | U = 293.50; p = .89 |
No. of sessions attended–completers M (S.D.) | 16.00 (0.00) | 15.50 (1.41) | 15.79 (0.92) | U = 38.50; p = .68 |
No. of partners that attended first session | 15 (60.0) | 12 (50.0) | 27 (55.1) | X2 (1) = 0.50; p = .48 |
Relationship intact at posttreatment (completers) | 24 (96.0) | 24 (100.0) | 48 (98.0) | X2 (1) = .98; p = .32 |
Treatment duration–ITT (weeks) M (S.D.) | 22.19 (14.43) | 20.21 (12.44) | 21.22 (13.39) | t (47) = 0.51; p = .61 |
Treatment duration–completers (weeks) M (S.D.) | 32.31 (12.53) | 33.93 (6.80) | 32.99 (10.22) | U = 30.00; p = .25 |
Completed pretreatment assessment (t1) | 25 (100.0) | 24 (100%) | 49 (100%) | - |
Completed halfway treatment assessment (t2) | 11 (44.0%) | 13 (54.2%) | 24 (49.0%) | X2 (1) = 0.51; p = .48 |
Completed posttreatment assessment (t3) | 11 (44.0%) | 8 (33.3%) | 19 (38.8%) | X2 (1) = 0.59; p = .44 |