Table 2.
Demographic characteristics of subjects.
| Characteristics | Sample size | Estimate % (95% CI) |
|---|---|---|
| Sex (n = 28,620) | ||
| Male | 12,875 | 52.29 (51.74–52.85) |
| Female | 15,745 | 47.71 (47.15–48.26) |
| Age (n = 28,620) | ||
| < 50 | 14,332 | 62.00 (61.04–62.97) |
| 50–59 | 5515 | 18.89 (18.27–19.51) |
| 60–69 | 5000 | 11.30 (10.85–11.77) |
| ≥ 70 | 3773 | 7.81 (7.41–8.24) |
| Marital status (n = 26,740) | ||
| Married | 20,644 | 74.95 (74.03–75.84) |
| Single (separated or divorced) | 3491 | 10.10 (9.61–10.62) |
| Never-married | 2605 | 14.95 (14.15–15.80) |
| Employment status (n = 28,541) | ||
| Employed | 17,307 | 64.19 (63.40–64.97) |
| Unemployed | 11,234 | 35.81 (35.03–36.60) |
| Education level (n = 28,541) | ||
| < High school | 9918 | 26.10 (25.18–27.05) |
| High school | 9755 | 38.94 (38.08–39.80) |
| > High school | 8868 | 34.96 (33.89–36.04) |
| Monthly family income (n = 28,310) | ||
| < 25th | 5284 | 14.80 (14.06–15.57) |
| 25–50th | 7149 | 24.85 (23.96–25.76) |
| 50–75th | 7851 | 29.64 (28.68–30.61) |
| ≥ 75th | 8026 | 30.72 (29.40–32.06) |
| Number of household members (n = 28,608) | ||
| 1 | 2521 | 7.26 (6.68–7.88) |
| 2 | 7695 | 21.58 (20.84–22.33) |
| 3 | 6968 | 26.67 (25.82–27.54) |
| 4 | 7725 | 30.92 (29.95–31.91) |
| ≥ 5 | 3699 | 13.58 (12.80–14.39) |
| Residence area (n = 28,620) | ||
| Urban | 22,156 | 83.14 (81.04–85.05) |
| Rural | 6104 | 16.86 (14.95–18.96) |
| Smoking status | ||
| Self-reported 1 (n = 28,620) | ||
| Non-smoker | 17,408 | 56.41 (55.73–57.09) |
| Ex-smoker | 5229 | 18.05 (17.55–18.56) |
| Smoker | 5983 | 25.54 (24.87–26.22) |
| Cotinine-verified (n = 28,620) | ||
| Non-smoker | 21,483 | 70.33 (69.58–71.07) |
| Smoker | 7137 | 29.67 (28.93–30.42) |
| Survey-cotinine verified (n = 28,620) | ||
| Non-smoker | 16,595 | 53.57 (52.85–54.29) |
| Ex-smoker | 4712 | 15.98 (15.49–16.47) |
| Smoker | 7313 | 30.45 (29.72–31.20) |
| Body mass index (n = 28,620) | ||
| < 23 | 12,318 | 43.64 (42.90–44.37) |
| 23–25 | 6812 | 23.71 (23.13–24.30) |
| ≥ 25 | 9415 | 32.66 (31.95–33.37) |
| Hypertension (n = 28,620) | 7917 | 23.69 (23.04–24.36) |
| Diabetes (n = 28,620) | 3082 | 8.80 (8.42–9.20) |
| Myocardial infarct or stroke (n = 28,620) | 811 | 1.98 (1.81–2.16) |
| Myocardial infarct | 236 | 0.60 (0.51–0.70) |
| Stroke | 599 | 1.44 (1.30–1.60) |