Fig. 5. Calibration curves and Kaplan-Meier curves of the RSF models in different cohorts.

Calibration curves of the RSF model for 1-, 2-, and 3-year overall survival in the a Union cohort, b Hefei cohort, and c Shihezi cohort. Kaplan–Meier survival analysis for risk stratification based on the RSF model. Significant survival differences were observed in the d Union (P < 0.001), e Hefei (P < 0.001), and f Shihezi (P = 0.0054) cohorts. The distributions of the high and low risk patients with CRC in the three medical cohorts are displayed in the g Union, h Hefei, and i Shihezi cohorts.