Table 1.
Sociodemographic characteristics of the participants between the years 2002 and 2010–2012.
| Characteristics | Total | 2002 | 2010–2012 | p-Value |
|---|---|---|---|---|
| Total, n (%) | 225,452 | 82,377 | 143,075 | |
| Gender, n (%) | <0.001 | |||
| Male | 108,173 (48.0) | 42,734 (51.9) | 65,439 (45.7) | |
| Female | 117,279 (52.0) | 39,643 (48.1) | 77,636 (54.3) | |
| Age (year), Mean ± SD | 46.0 ± 16.2 | 41.2 ± 14.4 | 48.7 ± 16.6 | <0.001 |
| Age group (year), n (%) | <0.001 | |||
| 15–29.9 | 40,172 (17.8) | 17,902 (21.7) | 22,270 (15.6) | |
| 30–44.9 | 64,784 (28.7) | 31,231 (37.9) | 33,553 (23.5) | |
| 45–55.9 | 72,373 (32.1) | 23,644 (28.7) | 48,729 (34.1) | |
| ≥60 | 48,123 (21.4) | 9,600 (11.7) | 38,523 (26.9) | |
| Region type, n (%) | <0.001 | |||
| Urban areas | 96,038 (42.6) | 23,315 (28.3) | 72,723 (50.8) | |
| Rural areas | 129,414 (57.4) | 59,062 (71.7) | 70,352 (49.2) | |
| Education level, n (%) | <0.001 | |||
| Primary school or below | 88,772 (39.4) | 34,222 (41.5) | 54,550 (38.1) | |
| Junior or senior high school | 120,036 (53.2) | 43,180 (52.4) | 76,856 (53.7) | |
| College and above | 16,644 (7.4) | 4975 (6.0) | 11,669 (8.2) | |
| Annual average income per capita, n (%) | <0.001 | |||
| Low | 97,794 (43.4) | 48,864 (59.3) | 48,930 (34.2) | |
| Middle | 64,237 (28.5) | 21,147 (25.7) | 43,090 (30.1) | |
| High | 51,833 (23.0) | 10,844 (13.2) | 40,989 (28.7) | |
| No response | 11,588 (5.1) | 1522 (1.9) | 10,066 (7.0) |