Fig. 2
Post-AE survival curves of propensity score-matched AE-RA-ILD and AE-IPF. a After propensity score matching for age, sex, baseline %FVC and P/F at AE, post-AE cumulative survival rates at 3, 6 and 12 months were 56.2%, 46.9% and 31.5% in patients with AE-IPF, respectively, and 59.4%, 50.0% and 43.3% in patients with AE-RA-ILD, respectively (P = 0.3217). b After propensity score matching for age, sex, baseline %FVC, P/F ratio and baseline HRCT pattern, post-AE cumulative survival rates at 3, 6 and 12 months were 64.5%, 48.4% and 45.2% in patients with AE-IPF, respectively, and 58.1%, 51.6% and 44.7% in patients with AE-RA-ILD, respectively (P = 0.7845). AE acute exacerbation, RA rheumatoid arthritis, ILD interstitial lung disease, IPF idiopathic pulmonary fibrosis, %FVC percent predicted forced vital capacity, P/F PaO2/FiO2 ratio, HRCT high-resolution computed tomography