Table 3.

Diagnostic performance of radiological characteristics of good washout (relative percentage washout ≥ 40%) and poor washout (relative percentage washout < 40%) unilateral lipid poor adrenal masses

	Good washout				Poor washout
	AUC	Value	Sensitivity (%)	Specificity (%)	AUC	Value	Sensitivity (%)	Specificity (%)
Largest diameter (cm)	0.880	3.55	100	70	0.371	—	—	—
Arterial (HU)	0.967	87.6	100	90	0.844	61.7	95	63
		139.9	66.7	100		135.0	75	100
Venous (HU)	0.953	97.7	93	90	0.780	—	—	—
Delayed (HU)	0.900	54.1	86.7	90	0.715	—	—	—
PAE (%)	0.900	218.8	93.3	80	0.800	72.2	90	67
Arterial HU of mass/aorta	0.987	0.327	100	80	0.789	0.308	70	78
		0.441	93.3	100		—	—	—

Abbreviations: AUC, area under curve; HU, Hounsfield unit; PAE, percentage arterial enhancement.