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Univariate analysis of air pollution factors for the prediction of chronic obstructive pulmonary disease (COPD) acute exacerbations.
| OR (95% CI) | P-value | |
|---|---|---|
| PM10 a day before AE | 1.0017 (1.0000–1.0034) | 0.0260 |
| Cumulative PM10 of 3 days before AE | 1.0006 (0.9999–1.0013) | 0.0522 |
| Cumulative PM10 of 5 days before AE | 1.0003 (0.9998–1.0008) | 0.1211 |
| Cumulative PM10 of 7 days before AE | 1.0002 (0.9998–1.0006) | 0.1622 |
OR, odds ratio; PM, particulate matter; AE, acute exacerbation.
