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Retrospective Study
Copyright: ©Author(s) 2026.
World J Gastrointest Surg. Mar 27, 2026; 18(3): 115906
Published online Mar 27, 2026. doi: 10.4240/wjgs.v18.i3.115906
Figure 4
Figure 4 Discrimination evaluation and internal model validation. A and B: Receiver operating characteristic curves of the nomogram prediction model in the training and external validation cohorts 1 year, 2 years, and 3 years after surgery; C and D: Time-dependent C-index analysis. AUC: Area under the receiver operating characteristic curve; CA19-9: Carbohydrate antigen 19-9; SII: Systemic immune inflammation index; PNI: Prognostic nutritional index.


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