Table 1 Sociodemographic characteristics of the participating population (n = 1636)
| Â | Number (percent, %) |
|---|---|
Gender | |
 Male | 758 (46.3) |
 Female | 878 (53.7) |
Ethnicity | |
 Han | 863 (52.8) |
 Yi | 773 (47.2) |
Education levels | |
 Illiterate | 274 (16.7) |
 Primary school | 599 (36.6) |
 Middle school | 402 (24.6) |
High school and above | 361 (22.1) |
Age-group | |
 60–64 | 399 (24.4) |
 65–69 | 498 (30.4) |
 70–74 | 354 (21.6) |
 75–79 | 189 (11.6) |
 80 years and above | 196 (12.50) |
Living arrangement | |
 Living alone | 205 (12.5) |
 Living with family members | 1431 (87.5) |
Health insurance | |
 Yes | 1612 (98.5) |
 No | 24 (1.5) |