Table 1 The characteristics of interviewed MMT participants
Variable | Measure | |
No. (%) | Â | |
Sex | 14 (67.7) | Â |
 Male | 7 (33.3) |  |
 Female |  |  |
|  | Mean ± SD | Median (Q1, Q3) |
Age (years old) | 48.1 ± 6.1 | 46.0 (44.0, 51.0) |
Duration of drug use (years) | 13.9 ± 4.9 | 14.0 (11.0, 18.0) |
Duration of receiving MMT (years) | 12.0 ± 3.7 | 14.0 (10.0, 15.0) |
|  | Mean ± SD | Median (Q1, Q3) |
Daily methadone dose (mg) | 65.6 ± 52.1 | 47.0 (20.0, 125.0) |