Table 1 Demographic characteristic of the study participants
Variables | n | % |
|---|---|---|
Sex | ||
Male | 2905 | 48.4 |
Female | 3101 | 51.6 |
Age | ||
40–49 years | 1102 | 18.3 |
50–54 years | 1106 | 18.4 |
55–59 years | 879 | 14.6 |
60–64 years | 909 | 15.1 |
≥ 65 years | 2010 | 33.5 |
Ethnicity | ||
Han | 3664 | 61.0 |
Yi ethnic minority | 2272 | 39.0 |
Educational level | ||
Illiterate | 3328 | 55.4 |
Primary (grade 1–6) or higher | 2678 | 45.6 |
Approximate yearly household income (Yuan) | ||
Max | 20000 | |
P75 | 7000 | |
P50 | 4000 | |
P25 | 2000 | |
Min | 1100 | |