Table 1.
Baseline characteristics of study cohorts.
| Characteristic | All MMT patients n=16 085 | With baseline HCV test n=12 755 | Refused HCV test at baseline n=3330 | Did not agree to be followed n=1856 | Followed n=1200 |
|---|---|---|---|---|---|
|
| |||||
| No. (%) | No. (%) | No. (%) | No. (%) | No. (%) | |
| Gender | |||||
| Male | 11 769 (73.2) | 9319 (73.1) | 2450 (73.6) | 1383 (74.5) | 908 (76.0) |
| Female | 4316 (26.8) | 3436 (26.9) | 880 (26.4) | 473 (25.5) | 292 (24.0) |
| Age (years) | |||||
| ≤ 30 | 2398 (14.9) | 1968 (15.4) | 430 (12.9) | 240 (12.9) | 101 (8.4) |
| 31–39 | 6402 (39.8) | 5162 (40.5) | 1240 (37.3) | 698 (37.6) | 272 (22.6) |
| ≥ 40 | 7285 (45.3) | 5625 (44.1) | 1660 (49.8) | 918 (49.5) | 827 (69.0) |
| Education | |||||
| Elementary or lower | 1127 (7.0) | 858 (6.7) | 269 (8.1) | 129 (7.0) | 67 (5.6) |
| Junior high school | 10 720 (66.6) | 8440 (66.2) | 2280 (68.4) | 1262 (68.0) | 724 (60.3) |
| Senior high school | 3891 (24.2) | 3166 (24.8) | 725 (21.8) | 419 (22.5) | 371 (30.9) |
| Junior college or higher | 347 (2.2) | 291 (2.3) | 56 (1.7) | 46 (2.5) | 38 (3.2) |
| Marital status | |||||
| Married or have a regular partner | 6985 (43.4) | 5524 (43.3) | 1461 (43.9) | 883 (47.6) | 590 (49.2) |
| Divorced/widowed | 2833 (17.6) | 2264 (17.8) | 569 (17.1) | 288 (15.5) | 214 (17.8) |
| Single | 6267 (39.0) | 4967 (38.9) | 1300 (39.0) | 685 (36.9) | 396 (33.0) |
| Employment | |||||
| Employed | 2179 (13.5) | 1682 (13.2) | 497 (14.9) | 234 (12.6) | 141 (11.8) |
| Unemployed | 13 906 (86.5) | 11073 (86.8) | 2833 (85.1) | 1622 (87.4) | 1059 (88.2) |
| Living status | |||||
| With family | 12 040 (74.9) | 9538 (74.8) | 2502 (75.2) | 1417 (76.3) | 911 (75.9) |
| With friends | 1724 (10.7) | 1426 (11.2) | 298 (8.9) | 209 (11.3) | 90 (7.5) |
| Alone | 2321 (14.4) | 1791 (14.0) | 530 (15.9) | 230 (12.4) | 199 (16.6) |
| Drug administration method | |||||
| Inhaled | 3490 (21.7) | 2799 (21.9) | 691 (20.8) | 657 (35.4) | 478 (39.8) |
| Injected | 11 174 (69.5) | 8892 (69.7) | 2282 (68.5) | 1095 (59.0) | 628 (52.3) |
| Mixed (injected and inhaled) | 1421 (8.8) | 1064 (8.2) | 357 (10.7) | 104 (5.6) | 94 (7.9) |
| Duration of drug use (years) | |||||
| ≤ 5 | 3062 (22.2) | 2821 (22.1) | 748 (22.5) | 525 (28.3) | 80 (6.7) |
| 6–9 | 3098 (19.3) | 2516 (19.7) | 582 (17.5) | 342 (18.4) | 274 (22.8) |
| ≥10 | 9418 (58.5) | 7418 (58.2) | 2000 (60.0) | 989 (53.3) | 846 (70.5) |
| Drug use in the past 30 days | |||||
| Yes | 15 440 (96.0) | 12242 (96.0) | 3198 (96.0) | 1791 (96.5) | 1158 (96.5) |
| No | 645 (4.0) | 513 (4.0) | 132 (4.0) | 65 (3.5) | 42 (3.5) |
| Injection drug use in the past 30 days | |||||
| Yes | 10 428 (64.8) | 8446 (66.2) | 1982 (59.5) | 916 (51.1) | 566 (48.9) |
| No | 5657 (35.2) | 4309 (33.8) | 1348 (40.5) | 875 (48.9) | 592 (51.1) |
MMT = methadone maintenance treatment; HCV = hepatitis C virus.