Table 1. Demographic characteristics of participants above 30 years old.
| Characteristics | Total (N=30092) | Male (n=13358) | Female (n=16734) | p | |||
|---|---|---|---|---|---|---|---|
| N | Percent (95% CI) | N | Percent (95% CI) | N | Percent (95% CI) | ||
| Age group (years) | <.001 | ||||||
| 30–39 | 6364 | 25.7 (24.8-26.6) | 2873 | 27.7 (26.6-28.9) | 3491 | 23.6 (22.6-24.5) | |
| 40–49 | 6482 | 27.4 (26.6-28.3) | 3018 | 28.9 (27.8-30.0) | 3464 | 25.9 (24.9-26.8) | |
| 50–59 | 6638 | 23.3 (22.6-24.0) | 2812 | 22.8 (21.8-23.7) | 3826 | 23.9 (23.1-24.7) | |
| 60–69 | 5923 | 13.6 (13.1–14.1) | 2633 | 12.7 (12.1–13.3) | 3290 | 14.7 (14.0–15.3) | |
| 70–79 | 4685 | 9.9 (9.5-10.4) | 2022 | 8.0 (7.5-8.4) | 2663 | 12.0 (11.4-12.6) | |
| Marital status | <.001 | ||||||
| Single | 1251 | 6.2 (5.8–6.6) | 0818 | 9.1 (8.3–9.8) | 0433 | 3.2 (2.8–3.5) | |
| Married | 24528 | 81.8 (81.1–82.5) | 11803 | 85.7 (84.8–86.5) | 12725 | 77.7 (76.8–78.5) | |
| Widowed, divorced, and separated | 4313 | 12.0 (11.5–12.5) | 0737 | 5.2 (4.8–5.7) | 3576 | 19.1 (18.3–19.9) | |
| Education level | <.001 | ||||||
| ≤ Elementary school | 5472 | 14.3 (13.6–14.9) | 1408 | 7.9 (7.3–8.5) | 4064 | 21.0 (20.1–21.9) | |
| Middle school | 5029 | 14.0 (13.5–14.6) | 1941 | 11.7 (11.0–12.4) | 3088 | 16.5 (15.8–17.2) | |
| High school | 7026 | 25.9 (25.1–26.7) | 3288 | 26.3 (25.2–27.3) | 3738 | 25.5 (24.6–26.4) | |
| ≥ College | 12565 | 45.8 (44.7–46.9) | 6721 | 54.1 (52.8–55.4) | 5844 | 37.0 (35.8–38.2) | |
| Household monthly income | <.001 | ||||||
| <25th | 6253 | 16.4 (15.7–17.2) | 2420 | 13.6 (12.8–14.3) | 3833 | 19.5 (18.5–20.4) | |
| 25–49th | 7622 | 25.9 (25.0–26.8) | 3375 | 25.3 (24.3–26.4) | 4247 | 26.5 (25.5–27.5) | |
| 50–75th | 7989 | 28.5 (27.7–29.4) | 3704 | 30.0 (29.0–31.0) | 4285 | 27.0 (26.1–27.9) | |
| ≥75th | 8228 | 29.1 (28.0–30.3) | 3859 | 31.1 (29.8–32.4) | 4369 | 27.1 (25.9–28.2) | |
| Type of health insurance | <.001 | ||||||
| Medical aid | 0925 | 2.8 (2.4–3.1) | 0303 | 2.1 (1.8–2.4) | 0622 | 3.5 (3.0–3.9) | |
| National Health Insurance | 29167 | 97.2 (96.9–97.6) | 13055 | 97.9 (97.6–98.2) | 16112 | 96.5 (96.1–97.0) | |
| Living area | 0.543 | ||||||
| Urban area | 22638 | 78.6 (76.4–80.9) | 10001 | 78.5 (76.2–80.8) | 12637 | 78.8 (76.5–81.0) | |
| Rural area | 7454 | 21.4 (19.1–23.6) | 3357 | 21.5 (19.2–23.8) | 4097 | 21.2 (19.0–23.5) | |