Table 1.
Sample characteristics (N=5039)
| Variables | n | % |
| Age (years) | ||
| ≤20 | 774 | 15.4 |
| 21–30 | 1914 | 38.0 |
| 31–40 | 885 | 17.6 |
| 41–50 | 959 | 19.0 |
| ≥51 | 507 | 10.1 |
| Gender | ||
| Male | 2090 | 41.5 |
| Female | 2949 | 58.5 |
| Education level | ||
| Junior high school or less | 668 | 13.3 |
| Senior high school and junior college | 2528 | 50.2 |
| College and above | 1843 | 36.6 |
| Ethnicity | ||
| Han | 4234 | 84.0 |
| Minorities | 805 | 16.0 |
| Urbanicity | ||
| Urban | 2492 | 49.5 |
| Rural | 2547 | 50.5 |
| Monthly household income (US$) | ||
| <422 | 846 | 16.8 |
| 422–704 | 1485 | 29.5 |
| 705–1407 | 1422 | 28.2 |
| 1408–2815 | 858 | 17.0 |
| >2815 | 428 | 8.5 |
| Province by confirmed patients | ||
| Low case area | 1374 | 27.3 |
| Low-medium case area | 1386 | 27.5 |
| Medium case area | 1681 | 33.4 |
| High case area | 598 | 11.9 |