Fig. 2From: Risk factors and clinical characteristics of lung cancer in idiopathic pulmonary fibrosis: a retrospective cohort studyCumulative incidence of lung cancer development according to (a) gender (P < 0.001, log-rank test), b smoking status at diagnosis of idiopathic pulmonary fibrosis (P < 0.001, log-rank test), and (c) annual decline of 10% or more in forced vital capacity (P = 0.0563, log-rank test) using Kaplan-Meier curveBack to article page