Fig. 4

Establishment of the nomogram model using independent prognostic factors as a new prognostic model (A), three-year ROC curve and calibration curve of the model (B, D), and five-year ROC curve and calibration curve of the model (C, E). The results of the calibration and AUC were > 0.7, and the calibration curves showed good linearity for the three- and five-year BFS, revealing the predictive efficiency of the nomogram model. ROC, receiver operator characteristic; AUC, area under the curve; BFS, biochemical recurrence-free survival