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. 2020 Apr 9;158(2):529–538. doi: 10.1016/j.chest.2020.02.073

Figure 1.

Figure 1

A-B, Kaplan-Meier analyses for the primary composite outcome and death by category of primary exposure. A, Time to event analysis for death or first COPD-related hospitalization, stratified by exacerbation risk (N = 738); median follow-up 2.29 y. Data for patients who neither died nor had a first hospitalization for COPD were censored at the time of their last interview. A total of 248 patients (43.4%) in groups A and B and 84 patients (50.3%) in groups C and D experienced the composite outcome. B, Time to event analysis for death, stratified by exacerbation risk (N = 738); median follow-up 3.46 y. Data for patients who were alive as of August 31, 2015, were censored at the time of their last interview. A total of 111 patients (19.4%) in groups A and B and 28 patients (16.8%) in groups C and D died. P values were generated from log-rank tests.