FIGURE 3.

Overall survival. a) Overall patient cohort; b) overall survival according to forced vital capacity (FVC) percentage at inclusion with a 70% threshold; c) overall survival according to Gender, Age and Physiology (GAP) index; d) overall survival according to disease subgroups. Survival estimates were performed using the Kaplan–Meier method in a) the overall population and b) patient subgroups by FVC decline, c) GAP index stage and d) disease subgroups compared by log-rank test. Baseline was defined as the date of disease progression. Patients were censored at the time of last clinic visit, lung transplantation for interstitial lung disease (ILD) or initiation of antifibrotic treatment. IIP: idiopathic interstitial pneumonia; HP: hypersensitivity pneumonitis.