Association between CRS and the number of BEs within 2 years before enrollment in patients with bronchiectasis.

OR: Odds ratio; 95%CI: 95% confidence interval; BSI: Bronchiectasis Severity Index Model 1: CRS diagnosis + adjustment with sex Model 2: Model 1 + adjustment with smoking status Model 3: Model 2 + adjustment with asthma or COPD diagnosis Model 4: Model 3 + adjustment with the BSI Association between CRS and the number of BEs within 2 years before enrollment in patients with bronchiectasis.