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Table 4: Area under ROC curve (univariate analysis)
Phase AUC 95% LCL 95% UCL Optimal Cutoff (HU) Sensitivity Specificity
Precontrast 0.983 0.954 1 62 0.966 0.983
Arterial 0.979 0.955 1 129 0.828 1
Venous 0.965 0.933 0.997 120.6 0.897 0.931
Delayed 0.957 0.916 0.998 125 0.966 0.879
Note:—AUC indicates area under the curve; HU, Hounsfield unit; LCL, lower control limit; UCL, upper control limit.
Phase	AUC	95% LCL	95% UCL	Optimal Cutoff (HU)	Sensitivity	Specificity
Precontrast	0.983	0.954	1	62	0.966	0.983
Arterial	0.979	0.955	1	129	0.828	1
Venous	0.965	0.933	0.997	120.6	0.897	0.931
Delayed	0.957	0.916	0.998	125	0.966	0.879