Population characteristics | Pooled sample | Matched Sample |
---|---|---|
(n = 1,035) (%) | (n = 975) (%) | |
Sex (male) | 64.0 | 67.4 |
Age (in years) | ||
18 to 30 | 4.8 | 7.2 |
31 to 40 | 32.9 | 41.2 |
41 to 49 | 62.3 | 51.6 |
Ethnicity (Han) | 87.3 | 83.3 |
Education (High school education or above) | 32.5 | 31.1 |
Marital status | ||
Never married | 38.4 | 42.6 |
Currently married | 29.9 | 31.1 |
Divorced or widowed | 31.7 | 26.3 |
Ever received methadone maintenance treatment (MMT) | 84.7 | 87.9 |