Table 2.
Outcomes at 3 months (treatment end) and 18 months
| Control | CM | ||||
|---|---|---|---|---|---|
| n/N, mean, or median | % or (IQR) | n/N, mean, or median | % or (IQR) | ||
| Admitted to an acute mental health service | 18 months | 85/259 | 33 | 90/272 | 33 |
| Number of admissions | 18 months | 0 | (0, 1) | 0 | (0, 1) |
| Any work or study | 3 months | 58/183 | 32 | 58/189 | 31 |
| 18 months | 45/135 | 33 | 42/145 | 29 | |
| Cannabis-positive urine | 3 months | 122/170 | 72 | 128/184 | 70 |
| 18 months | 76/124 | 61 | 77/136 | 57 | |
| Number of days using cannabis* (median) | 3 months | 30 | (3, 84) | 26 | (1, 67) |
| 18 months | 26 | (1, 142) | 26 | (0, 118) | |
| PANSS positive symptoms (median) | 3 months | 11 | (8, 16) | 10 | (8, 14) |
| 18 months | 10 | (8, 15) | 11 | (8, 13) | |
| PANSS negative symptoms (median) | 3 months | 14 | (10, 18) | 12 | (9, 17) |
| 18 months | 12 | (8, 17) | 12 | (9, 17) | |
| Number of days of using illicit substances other than cannabis (median) | 3 months | 0 | (0, 1) | 0 | (0, 1) |
| 18 months | 0 | (0, 2) | 0 | (0, 1) | |
| Number of days using alcohol (median) | 3 months | 4 | (0, 12) | 4 | (0, 15) |
| 18 months | 6 | (0, 24) | 6 | (0, 24) | |
| EQ-5D-3L utility score (mean) | 3 months | 0.7729 | 0.8175 | ||
| 18 months | 0.8032 | 0.8336 | |||
| SF-6D utility score (mean) | 3 months | 0.7018 | 0.7114 | ||
| 18 months | 0.7110 | 0.7205 | |||
| Number of psychoeducation sessions attended (median) | 4 | (0, 6) | 6 | (1, 6) | |
| Number of contingency management sessions attended (median) | 9 | (3, 12) | |||
| Number who attended 4 or more PE sessions (used in the post hoc analysis) | 137/263 | 52 | 168/273 | 62 | |
*At 3 months, this was for the previous 12 weeks/84 days. At 18 months, this was for the previous 168 days