Figure 4.

A-C, Cumulative incidence of asthma/COPD overlap in WTC-exposed firefighters who had a BD PFT. A, Cumulative incidence of asthma/COPD overlap in participants with blood EOS concentration ≥ 300 cells/μL (red) and < 300 cells/μL on first post-9/11 medical monitoring examination (blue). The level of significance shown in each panel was determined by using the log-rank test. B, Cumulative incidence in those who reported ever smoking (red) and never smoking (blue). C, Cumulative incidence in participants who had an accelerated rate of post-9/11 FEV₁ decline > 64 mL/y (red) and those with expected FEV₁ decline ≤ 64 mL/y (blue). EOS = eosinophil. See Figure 1 legend for expansion of other abbreviations.