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740 (95% CI 0.707-0.773), and that of the CSS nomogram was 0.752 (95% CI 0.719-0.785). In view of the validation set, the C-index of OS and CSS were 0.706 (95% CI 0.671-0.741) and 0.723 (95% CI 0.690-0.756), respectively. Calibration curves demonstrated the consistent degree of fit between actual and predicted values in nomogram models. From the perspective of DCA, the nomogram models were more beneficial than the tumor-node-metastasis (TNM) and the SEER stage for EOEC. In brief, the nomogram model can be considered as an individualized