Table 5.
Results of multivariate logistic regression stepwise regression analysis.
| Feature | β | SE | Wald | P | EXP(B) | 95% CI for EXP(B) | |
|---|---|---|---|---|---|---|---|
| Lower | Upper | ||||||
| Age (year) | 1.536 | 0.636 | 5.833 | 0.019 | 4.646 | 3.399 | 5.893 |
| Smoking or frequent passive smoking | 1.231 | 0.311 | 15.667 | <0.001 | 3.425 | 2.815 | 4.034 |
| Significant psychological stress in the past year | 0.515 | 0.134 | 14.771 | <0.001 | 1.674 | 1.411 | 1.936 |
| Presence of chronic lung disease | 0.742 | 0.237 | 9.802 | 0.003 | 2.100 | 1.636 | 2.565 |
| Elevated levels of carcinoembryonic antigen | 1.011 | 0.352 | 8.249 | 0.006 | 2.748 | 2.058 | 3.438 |
| Occupational exposure (presence of air pollution in the work environment) | 1.067 | 0.491 | 4.722 | 0.034 | 2.907 | 1.944 | 3.869 |