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Kaplan–Meier survival curves of modified interstitial pneumonia with autoimmune features (IPAF), original IPAF, idiopathic pulmonary fibrosis (IPF) and connective tissue disease (CTD)-interstitial lung disease (ILD) cohorts. Modified IPAF cohort survival was similar to the CTD-ILD cohort (p=0.26), marginally better than the original IPAF cohort (p=0.09) and significantly better than the IPF cohort (p=0.005).
