Table 1 Bivariate analyses of factors associated with methadone doses among 158 methadone-treated PWID in Thailand
Characteristic | Total n (%) 158 (100) | Methadone dosageb | p value | Methadone dosageb | p value | ||
|---|---|---|---|---|---|---|---|
≥ 60 mg/dayn (%)16 (10.1) | < 60 mg/dayn (%)142 (89.9) | > 30 mg/dayn (%)78 (49.4) | ≤ 30 mg/dayn (%)80 (50.6) | ||||
Age (median, IQR) | 38 (34–48) | 36 (34–44) | 38 (34–48) | 0.273 | 37 (33–46) | 40 (35–51) | 0.027 |
Male gender | 131 (82.9) | 13 (81.2) | 118 (90.1) | 0.739c | 65 (83.3) | 66 (82.5) | 0.889 |
HIV-positive | 30 (19.0) | 7 (43.8) | 23 (16.2) | 0.015c | 18 (23.1) | 12 (15.0) | 0.196 |
Daily heroin injectiond | 22 (13.9) | 1 (6.3) | 21 (14.8) | 0.701c | 11 (14.1) | 11 (13.8) | 0.949 |
Daily midazolam injectiond | 76 (48.1) | 8 (50.0) | 68 (47.9) | 0.873 | 39 (50.0) | 37 (46.3) | 0.637 |
Daily methamphetamine injectiond | 7 (4.4) | 0 (0.0) | 7 (4.9) | N/A | 4 (5.1) | 3 (3.8) | 0.718c |
Daily methadone injectiond | 23 (14.6) | 2 (12.5) | 21 (14.8) | >0.999c | 13 (16.7) | 10 (12.5) | 0.458 |
Syringe sharingd | 30 (19.0) | 2 (12.5) | 28 (19.7) | 0.738c | 13 (16.7) | 17 (21.3) | 0.463 |
Ever acquired street methadone because prescribed dosages of methadone were too low | 25 (15.8) | 3 (18.8) | 22 (15.5) | 0.721c | 16 (20.5) | 9 (11.3) | 0.111 |
Duration of methadone treatmenta | |||||||
< 1 month | 4 (2.5) | 0 (0.0) | 4 (2.8) | N/A | 1 (1.3) | 3 (3.8) | N/A |
≥ 1 month, < 6 months | 26 (16.5) | 2 (12.5) | 24 (16.9) | 10 (12.8) | 16 (20.0) | ||
≥ 6 months, < 12 months | 11 (6.7) | 0 (0.0) | 11 (7.7) | 6 (7.7) | 5 (6.3) | ||
≥ 12 month | 115 (72.8) | 14 (87.5) | 101 (71.1) | 60 (76.9) | 55 (68.8) | ||