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The calibration plots for internal validation of (A) actual 5-year OS and (B) 10-year OS; (C) actual 5-year DSS and (D) actual 10-year DSS. The 45-degree dashed line represents an ideal match between the actual observed survival (Y-axis) and nomogram-predicted survival (X-axis). The perpendicular line represents 95% confidence intervals. Closer distances from the points to the dashed line mean a higher prediction accuracy.
