Fig. 1

a. Receiver operating characteristic curve analysis of the risk model for predicting suboptimal cytoreduction. The area under the curve was 0.775 (95% confidence interval, 0.64–0.88; p = 0.0001). b. Comparison of the receiver operating characteristic curve findings between our risk model and the conventional peritoneal cancer index. The area under the curve was 0.775 for the risk model and 0.562 for the peritoneal cancer index (p = 0.0311)