Survival Risk Prediction of Esophageal Squamous Cell Carcinoma Based on BES-LSSVM

Table 4

Results of ROC curve analysis for PI critical threshold.

Project	ROC for all PI samples	ROC for low PI samples	ROC for high PI samples
Area under the ROC curve (AUC)	0.660	0.614	0.576
Standard error	0.030	0.056	0.033
95 confidence interval	0.600 to 0.719	0.505 to 0.723	0.511 to 0.642
Significance level	<0.0001	0.038	0.029
Youden index	0.237	0.284	0.158
Associated criterion	0.303	0.016	0.873
Sensitivity	0.796	0.742	0.309
Specificity	0.440	0.542	0.848