| Gender |
| Male | 3606 (47.9) |
| Female | 3928 (52.1) |
| Age |
| 35–39 years | 285 (3.8) |
| 40–49 years | 1484 (19.7) |
| 50–59 years | 2001 (26.6) |
| 60–69 years | 1872 (24.8) |
| ≥ 70 years | 1892 (25.1) |
| Ethnicity |
| Han | 2502 (33.2) |
| Na Xi | 2531 (33.6) |
| Bai | 2501 (33.2) |
| Level of education |
| Primary (grade 1–6) or lower | 4743 (63.0) |
| Middle (grade 7–9) or higher | 2791 (37.0) |
| Approximate annual household income |
| Good (≥$820) | 3738 (49.6) |
| Poor (<$820) | 3796 (50.4) |
| Access to medical services |
| Good | 5825 (75.2) |
| Poor | 1874 (24.9) |
| Current smokers | 2291 (30.4) |
| Former smokers | 636 (8.4) |
| SHS exposure | 1588 (30.3) |
| Tobacco cultivators | 689 (9.1) |
| Daily indoor exposure to biomass fuel | 297 (3.9) |
| Family history of lung disease | 89 (1.2) |
| Spirometry † |
| FEV1, L | 1.7 ± 1.1 |
| FVC, L | 2.1 ± 1.1 |
| FEV1/FVC, % | 81.6 ± 13.2 |
| Mean BMI (kg/m2, mean ± SD) | 23.6 ± 3.6 |
