Table 1 General characteristics of the study population by survey year
Variable | Survey year | |
|---|---|---|
2011 n (%) | 2021 n (%) | |
Sex | Â | Â |
 Male | 3960(48.4) | 3739(49.4) |
 Female | 4227(51.6) | 3833(50.6) |
Age | Â | Â |
 35–44 years | 1851(22.6) | 1256(16.6)* |
 45–54 years | 2119(25.9) | 1905(25.2) |
 55–64 years | 2014(24.6) | 1856(24.5) |
 65–74 years | 1403(17.1) | 1670(22.1) |
 ≥75 years | 800(9.8) | 885(11.7) |
Ethnicity | Â | Â |
 Han | 5008(61.2) | 4124(54.5)* |
 Minority | 3179(38.8) | 3448(45.5) |
Education | Â | Â |
 Illiterate | 2495(30.5) | 1730(22.8)* |
 Primary (grade 1–6) or higher | 5692(69.5) | 5842(77.2) |
Annual household income | Â | Â |
 Low | 4196(51.3) | 3844(50.8) |
 High | 3991(48.7) | 3728(49.2) |
Access to medical services | Â | Â |
 Poor | 3645(44.5) | 2434(32.1)* |
 Good | 4542(55.5) | 5138(67.9) |
SEP | Â | Â |
 Low | 2175(26.6) | 1863(24.6)* |
 Medium | 4132(50.4) | 3841(50.7) |
 High | 1880(23.0) | 1868(24.7) |