Application value of multiphase contrast-enhanced computed tomography radiomics in preoperative evaluation of peritoneal metastasis in gastric cancer

Table 4 Performance comparison of different radiomics models (%)

Model	SMOTE-processed training set (n = 178)						Validation set (n = 60)
	AUC (95%CI)	Sensitivity	Specificity	Accuracy	PPV	NPV	AUC (95%CI)	Sensitivity	Specificity	Accuracy	PPV	NPV
Arterial phase	0.801 (0.738-0.857)	73.0	75.3	74.2	74.7	73.6	0.781 (0.661-0.874)	71.4	74.4	73.3	60.0	82.9
Venous phase	0.859 (0.798-0.910)	79.8	80.9	80.3	80.7	80.0	0.834 (0.727-0.915)	76.2	82.1	80.0	69.6	86.5
Delayed phase	0.826 (0.762-0.882)	75.3	77.5	76.4	77.0	75.8	0.806 (0.692-0.894)	71.4	79.5	76.7	65.2	83.8
Multiphase combined	0.894 (0.842-0.936)	85.4	83.1	84.3	83.5	85.1	0.876 (0.783-0.941)	81.0	84.6	83.3	73.9	89.2

SMOTE: Synthetic minority oversampling technique; 95%CI: 95% confidence interval; AUC: Area under the curve; PPV: Positive predictive value; NPV: Negative predictive value.