Demographic
| Variables | N (%)/mean±SD |
| Gender | |
| Male | 3653 (89.2) |
| Female | 442 (10.8) |
| Age | 45.94±14.49 |
| Education level | |
| Elementary or below | 469 (11.5) |
| Junior high school | 680 (16.6) |
| High school | 1666 (40.7) |
| Junior college | 567 (13.8) |
| Undergraduate or above | 713 (17.4) |
| Marital status | |
| Single | 976 (23.9) |
| Married | 2685 (65.8) |
| Divorced/widowed/separated | 421 (10.3) |
| Monthly household income (NTU) | |
| ≤20 000 | 640 (18.4) |
| 20 001–40 000 | 910 (26.1) |
| 40 001–60 000 | 707 (20.3) |
| 60 001–80 000 | 481 (13.8) |
| 80 001–10 000 | 267 (7.7) |
| ≥100 001 | 482 (13.8) |
| Daily cigarette consumption | |
| ≤15 (light) | 2017 (49.4) |
| ≥16 (heavy) | 2069 (50.6) |
| Smoking status | |
| Everyday | 3353 (81.9) |
| Some days | 742 (18.1) |
| Self-reported health | 3.71±1.08 |