Table 4.
Conditional multiple logistic regressions for all patients with chronic obstructive pulmonary disease (COPD) in the cooling-down season, with odds ratios (ORs) and 95% confidence intervals (CIs) of relative humidity (RH), atmospheric pressure (AP), ambient temperature (TX), along with single air pollutants.
| Cooling-down season | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR (95% CI) | P-value | OR (95% CI) | P-value | OR (95% CI) | P-value | OR (95% CI) | P-value | OR (95% CI) | P-value | OR (95% CI) | P-value | |
| RH | 1.04(0.99–1.08) | 0.133 | 1.06(1.01–1.11) | 0.022 | 1.04(0.99–1.09) | 0.081 | 1.04(0.99–1.09) | 0.099 | 1.03(0.98–1.08) | 0.202 | 1.07(1.01–1.13) | 0.022 |
| AP | 1.03(0.92–1.15) | 0.587 | 1.03(0.92–1.15) | 0.652 | 1.04(0.93–1.16) | 0.514 | 1.04(0.93–1.16) | 0.526 | 1.06(0.95–1.18) | 0.327 | 1.05(0.94–1.18) | 0.376 |
| TX | 0.77(0.68–0.88) | <0.001 | 0.74(0.65–0.84) | <0.001 | 0.76(0.67–0.86) | <0.001 | 0.77(0.68–0.87) | <0.001 | 0.78(0.68–0.88) | <0.001 | 0.74(0.65–0.85) | <0.001 |
| CO | 1.03(1.00–1.05) | 0.072 | ||||||||||
| PM10 | 1.02(1.00–1.04) | 0.017 | ||||||||||
| PM2.5 | 1.02(0.99–1.04) | 0.236 | ||||||||||
| NO2 | 1.05(0.98–1.12) | 0.186 | ||||||||||
| SO2 | 0.88(0.64–1.19) | 0.396 | ||||||||||
| O3 | 1.04(1.00–1.08) | 0.055 | ||||||||||