A nomogram was constructed to predict specific outcomes based on the IRRS and clinical variables using the rms package (38 ). ROC curves, calibration curves, and decision curve analysis (DCA) curves were drawn to verify the reliability of the nomogram. In addition, the nomogram was compared with the traditional TNM staging system by calculating the integrated discrimination improvement (IDI). Finally, the Dynnom package (cran.r-project.org/web/packages/rms) was used to generate an online version of the nomogram model with an interactive interface for clinical applications.
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