Table 4.
Crude and adjusted odds ratios for COPD (FEV1/FVC<LLN)
| Variable | OR (crude) (95% CI) | p-value | OR (multivariate model) (95% CI) | p-value | |
|---|---|---|---|---|---|
| Altitude | <1500 | 1 | 1 | ||
| >1500 | 0.85 (0.75; 0.95) | 0.005 | 0.90 (0.80; 1.02) | 0.111 | |
| Sex | Male | 1 | 1 | ||
| Female | 0.73 (0.68; 0.79) | <0.001 | 0.94 (0.86; 1.02) | 0.119 | |
| Age in years | 1.04 (1.04; 1.04) | <0.001 | 1.05 (1.04; 1.05) | <0.001 | |
| Years of education | >12 | 1 | 1 | ||
| 9–12 | 1.24 (1.11; 1.39) | <0.001 | 1.16 (1.03; 1.30) | 0.015 | |
| <9 | 1.48 (1.33; 1.64) | <0.001 | 1.24 (1.12; 1.39) | <0.001 | |
| Smoking status | Never | 1 | 1 | ||
| Former | 1.97 (1.79; 2.16) | <0.001 | 1.78 (1.61; 1.97) | <0.001 | |
| Current | 2.78 (2.53; 3.05) | <0.001 | 3.40 (3.08; 3.76) | <0.001 | |
| Dusty job | 1.37 (1.27; 1.48) | <0.001 | 1.18 (1.09; 1.29) | <0.001 | |