Table 1.
Baseline participant characteristics (total N = 250).
| PARTICIPANT CHARACTERISTIC | MEAN (SD) | P-VALUE* | |||
|---|---|---|---|---|---|
| TOTAL | RELAPSE (N = 125) | NO RELAPSE (N = 125) | |||
| Current age (years) | 38.64 (10.89) | 38.63 (10.78) | 38.65 (11.04) | 0.9874 | |
| Methadone dose (mg/day) | 78.99 (39.56) | 74.58 (35.42) | 83.43 (43.02) | 0.0787 | |
| Age of onset of opioid abuse (years) | 32.41 (9.69) | 33.61 (10.08) | 31.22 (9.16) | 0.0557 | |
| Duration of MMT (months) | 51.91 (45.93) | 45.46 (35.42) | 58.36 (53.85) | 0.0307 | |
| Days of benzodiazepine use over last month | 0.62 (3.38) | 0.91 (4.32) | 0.34 (2.04) | 0.1807 | |
| Days of cocaine use over last month | 0.62 (3.37) | 0.90 (4.31) | 0.34 (2.04) | 0.1846 | |
| Days of cannabis use over last month | 8.68 (12.44) | 7.72 (11.76) | 9.64 (13.06) | 0.2231 | |
| Length of time patient remains abstinent (days) | 99.04 (74.37) | – | – | – | |
| N (% OF TOTAL) | N (% OF RELAPSE) | N (% OF NO RELAPSE) | P-VALUE† | ||
| Sex | Women | 125 (50.0) | 68 (54.4) | 57 (45.6) | |
| Men | 125 (50.0) | 57 (45.6) | 68 (54.4) | 0.164 | |
| Marital status | Married or living with partner | 78 (31.2) | 42 (33.6) | 36 (28.8) | |
| Other | 172 (68.8) | 83 (66.4) | 89 (71.2) | 0.413 | |
| Employed | Yes | 86 (34.4) | 42 (33.6) | 44 (35.2) | |
| No | 164 (65.6) | 83 (66.4) | 81 (64.8) | 0.790 | |
| Smoking | Yes | 209 (83.9) | 107 (85.6) | 102 (81.6) | |
| No | 40 (16.0) | 18 (14.4) | 22 (17.6) | 0.473 | |
| Methadone dose | <80 mg/day | 124 (49.6) | 66 (52.8) | 58 (46.4) | |
| ≥80 mg/day | 126 (50.4) | 59 (47.2) | 67 (53.6) | 0.312 | |
| Injecting drug use | Yes | 16 (6.4) | 11 (8.80) | 5 (4.00) | |
| No | 234 (93.6) | 114 (91.2) | 120 (96.0) | 0.121 | |
| Source of opioid | From a prescription | 112 (44.8) | 62 (49.6) | 50 (40.0) | |
| Other | 138 (55.2) | 63 (50.4) | 75 (60.0) | 0.127 | |
| Hepatitis C | Yes | 57 (22.8) | 33 (26.4) | 24 (19.2) | |
| No | 193 (77.2) | 92 (73.6) | 101 (80.8) | 0.175 | |
| Chronic pain | Yes | 75 (29.6) | 34 (27.2) | 40 (32.0) | |
| No | 175 (70.0) | 91 (72.8) | 85 (68.0) | 0.406 | |
| Diabetes | Yes | 17 (6.8) | 9 (7.20) | 8 (6.40) | |
| No | 233 (93.2) | 116 (92.8) | 117 (93.6) | 0.802 | |
Notes:
*
T-test was used for comparing means of continuous variables.
†
Pearson’s chi-square test was used for comparing means of binary variables. Refer to Supplementary Data for an outline of the defnitions and measurements for each variable.