3. Receiver operating characteristic (ROC) curve of predictive model from development set (n=1,112). AUC=0.791, 95% CI=0.762−0.820. The value of 0.155 (0.558, 0.908) represents the most optimal cut-off value of the nomogram to predict peritoneal dissemination. At this cut-off value, the sensitivity for predicting peritoneal dissemination was 90.8%, and the specificity was 55.8%. AUC, area under the curve; 95% CI, 95% confidence interval.