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Crude COPD Exacerbation Rates by Aspirin Use in Propensity Score-Matched Sample
| COPD Exacerbation Rate | Aspirin Users (Mean ± SD) | Aspirin Nonusers (Mean ± SD) | P Value |
|---|---|---|---|
| Total exacerbations | 0.51 ± 0.86 | 0.65 ± 1.1 | .03 |
| Moderate exacerbations | 0.34 ± 0.63 | 0.44 ± 0.82 | .02 |
| Severe exacerbations | 0.17 ± 0.47 | 0.20 ± 0.63 | .4 |
