Fig. 3.From: Efficacy of a long-term pulmonary rehabilitation maintenance program for COPD patients in a real-life setting: a 5-year cohort study5-year survival probability for the “PR + maintenance” and “PR only” groups. Curves: Kaplan–Meier analysis; gray line: “PR only” group; black line: “PR + maintenance” group. Table: Comparison of main clinical characteristics of the “PR + maintenance” and “PR only” groupsBack to article page