Assessment of MRI-Based Radiomics in Preoperative T Staging of Rectal Cancer: Comparison between Minimum and Maximum Delineation Methods

Table 3

ROC analysis of the prediction model for the training and validation sets.

	Training set		Validation set
	Method 1	Method 2	Method 1	Method 2
AUC	0.838	0.928	0.808	0.903
95% CI	0.764-0.912	0.864-0.992	0.669-0.947	0.807-0.999
Sensitivity	0.871	0.903	0.956	0.870
Specificity	0.805	0.866	0.588	0.823
Accuracy	0.823	0.876	0.800	0.850
PLR	4.464	6.733	2.323	4.927
NLR	0.160	0.112	0.074	0.158
PPV	0.628	0.718	0.759	0.870
NPV	0.943	0.960	0.909	0.823
	0.036		0.035

PLR: positive likelihood ratio; NLR: negative likelihood ratio; NPV: negative predictive value; PPV: positive predictive value. Compared by DeLong test.