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 |