Table 3.

Predictive performance of the optimal radiomics signatures identified from triple-phase CT images.

Datasets	Phase	AUC (95% CI)	p-value	Sensitivity (%)	Specificity (%)	Accuracy (%)
Cohort 1	NP	0.898 (0.863–0.932)	0.003*	100.0	63.9	72.7
	AP	0.735 (0.653–0.817)	<0.001*	51.9	83.1	75.5
	PVP	0.756 (0.690–0.822)	<0.001*	81.5	61.4	66.4
	mp-CT	0.941 (0.909–0.973)	Ref.	88.9	83.1	84.5
Cohort 2	NP	0.680 (0.631–0.730)	<0.001*	76.9	57.1	61.8
	AP	0.769 (0.718–0.820)	0.026*	69.2	73.8	72.7
	PVP	0.734 (0.686–0.783)	<0.001*	76.9	57.1	61.8
	mp-CT	0.833 (0.798–0.868)	Ref.	76.9	71.4	72.7

p-values were analyzed by the Delong test.

AUC, area under the curve; CI, confidence interval; NP, noncontrast phase; AP, arterial phase; PVP, portal venous phase; mp-CT, multiple-phase CT.