Fig. 4

Construction of the risk model in the training cohort. A Distribution and survival status of patients based on the risk model. The left side of the dotted line: low-risk population. The right side: high-risk population. B Kaplan–Meier curves for the OS of patients in the low- and high-risk groups. C Time-dependent ROC curves of 1, 2, and 3 years. D Nomogram for prediction of overall survival rates in IPF patients based on the result of multivariate cox regression analysis. E Calibration curves of the nomogram prediction of 1-, 2-, and 3-year OS rates in IPF patients. F 1-Year DCA curve of the nomogram. G 2-Year DCA curve of the nomogram. H 3-Year DCA curve of the nomogram