Table 1 Univariate analysis of environmental factors to identify factors predicting chronic obstructive pulmonary disease (COPD) acute exacerbations.
OR (95% CI) | P-value | |
|---|---|---|
Average of humidity | 0.9967 (0.9930–1.0004) | 0.0137 |
Diurnal temperature variation | 1.0133 (0.9931–1.0339) | 0.0472 |
Hours of daylight | 1.0064 (0.9954–1.0176) | 0.2362 |
Lowest temperature a day before AE | 0.9945 (0.9894–0.9997) | 0.0060 |
Lowest temperature at AE | 0.9950 (0.9899–1.0001) | 0.0108 |
Cumulative lowest temperature of 3 days before AE | 0.9982 (0.9964–0.9999) | 0.0068 |
Cumulative lowest temperature of 5 days before AE | 0.9989 (0.9978–0.9999) | 0.0050 |
Cumulative lowest temperature of 7 days before AE | 0.9991 (0.9984–0.9999) | 0.0030 |
Maximum wind velocity | 1.0198 (0.9704–1.0718) | 0.1470 |
Cumulative rainfall of 3 days before AE | 0.9994 (0.9981–1.0006) | 0.3470 |
Cumulative rainfall of 5 days before AE | 0.9992 (0.9982–1.0002) | 0.1108 |
Cumulative rainfall of 7 days before AE | 0.9992 (0.9985–1.0000) | 0.0389 |
