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. 2015 Sep 4;10(9):e0137348. doi: 10.1371/journal.pone.0137348

Fig 2. Cox proportional hazards analysis on the risks of having bronchiectasis exacerbations during follow-up in patients with and without CRS.

Fig 2

The BEs during follow-up were analyzed with Cox regression model, with sex, smoking status, the diagnosis of asthma or COPD, and the BSI as covariates. The grey dotted line indicated the bronchiectasis patients without CRS, whereas the dark dotted line indicated the bronchiectasis patients with CRS. Shown at the bottom of the figure were the number of bronchiectasis patients at risks of experiencing subsequent exacerbations at different time points.