Excessive substance use, abstinence and psychosocial consequences* among patients who reported excessive substance use at baseline (n = 279)
| Outcome | Intervention group, no. (%)† | Control group, no. (%)† | OR (95% CI) | Intracluster correlation coefficient |
|---|---|---|---|---|
| Excessive use of alcohol, cannabis or both | ||||
| At 3 mo | 82 (73.9) | 85 (64.9) | 1.6 (0.9–2.8) | 0.022 |
| At 6 mo | 77 (76.2) | 78 (65.0) | 1.7 (0.9–3.2) | 0.003 |
| At 12 mo | 75 (78.9) | 68 (66.0) | 1.9 (0.9–4.0) | 0.029 |
| Excessive alcohol use | ||||
| At 3 mo | 79 (60.3) | 69 (62.2) | 1.1 (0.6–2.0) | 0.058 |
| At 6 mo | 72 (71.3) | 73 (60.8) | 1.4 (0.7–2.8) | 0.052 |
| At 12 mo | 70 (73.7) | 65 (63.1) | 1.6 (0.7–3.5) | 0.083 |
| Excessive cannabis use | ||||
| At 3 mo | 30 (27.0) | 24 (18.3) | 1.6 (0.8–3.4) | 0.052 |
| At 6 mo | 29 (28.7) | 28 (23.3) | 1.3 (0.6–2.5) | 0.028 |
| At 12 mo | 28 (29.2) | 18 (17.3) | 2.1 (1.0–4.4) | 0.034 |
| Abstinence from alcohol | ||||
| At 3 mo | 8 (7.2) | 13 (9.9) | 0.7 (0.3–1.8) | 0.003 |
| At 6 mo | 12 (10.0) | 11 (10.9) | 1.2 (0.5–3.2) | 0.041 |
| At 12 mo | 12 (12.5) | 6 (5.8) | 2.5 (0.9–7.4) | 0.033 |
| Abstinence from cannabis | ||||
| At 3 mo | 72 (64.9) | 97 (74.0) | 0.7 (0.4–1.2) | 0.003 |
| At 6 mo | 65 (64.4) | 87 (72.5) | 0.7 (0.4–1.3) | 0.013 |
| At 12 mo | 57 (59.4) | 77 (74.0) | 0.5 (0.2–1.0) | 0.033 |
| Psychosocial consequences related to alcohol use* | ||||
| At 3 mo | 52 (46.9) | 58 (44.3) | 1.1 (0.6–1.9) | 0.065 |
| At 6 mo | 49 (48.5) | 52 (43.3) | 1.2 (0.6–2.3) | 0.115 |
| At 12 mo | 45 (46.9) | 47 (45.2) | 1.1 (0.6–1.8) | 0.000 |
| Psychosocial consequences related to cannabis use* | ||||
| At 3 mo | 26 (23.4) | 20 (15.3) | 1.7 (1.0–3.1) | 0.000 |
| At 6 mo | 21 (20.8) | 21 (17.5) | 1.2 (0.5–2.6) | 0.027 |
| At 12 mo | 23 (24.0) | 15 (14.4) | 1.9 (0.9–4.3) | 0.034 |