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. 2016 Jun 9;11:1261–1268. doi: 10.2147/COPD.S94119

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© 2016 Hata et al. This work is published and licensed by Dove Medical Press Limited

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Overall survival in the four groups with pathological stage I disease: Kaplan–Meier curves for overall survival with pathological stage I disease.

Notes: The cumulative survival at 5 years was 21.4% in the CPFE group, 81.1% in the emphysema group, 50% in the IP group, and 84.9% in the normal group, respectively. Comparing with the CPFE group, there was significant difference in the normal group (P<0.0001, log-rank test) and the emphysema group (P<0.0001, log-rank test) but no difference in the IP group (P=0.2428, log-rank test).

Abbreviations: CPFE, combined pulmonary fibrosis and emphysema; IP, interstitial pneumonia.