Table 1 Descriptive statistics of socio-demographic. (N = 1040)
| Â | Total N (%) |
|---|---|
Gender | |
 Male | 836 (80.4%) |
 Female | 204 (19.6%) |
Occupation | |
 Unemployment | 143 (13.75%) |
 Employment | 897 (86.25%) |
Marry | |
 Unmarried | 630 (60.58%) |
 Married | 410 (39.42%) |
Income (CNY/Month) | |
 < 2000 | 153 (14.7%) |
 2000 ~ 5000 | 365 (35.1%) |
 5000 ~ 10,000 | 336 (32.3%) |
 > 10,000 | 186 (17.9%) |
Smoking | |
 Y | 987 (94.9%) |
 N | 53 (5.1%) |
Drinking | |
 Y | 536 (51.5%) |
 N | 504 (48.5%) |
Drug kind | |
 Methamphetamine | 785 (75.48%) |
 Heroin | 171 (16.44%) |
 Ketamine | 62 (5.96%) |
 Others | 22 (2.12%) |