Table 5.

Receiver operator characteristic of quantitative CT parameters for diagnosis of adrenal lipid-poor adenomas

CT parameter	AUC	95% CI	Criterion	Sensitivity (%)	Specificity (%)	Accuracy (%)
Size (mm)	0.785	0.667 ~ 0.903	≤39	91	62	78
APW (%)	0.839	0.740 ~ 0.939	≥33	85	69	78
RPW (%)	0.850	0.751 ~ 0.949	≥30	71	90	79

APW, absolute percentage washout ratio; AUC, area under the curve; RPW, relative percentage washout ratio.

Note—34 adrenal lipid-poor adenomas and 29 non-adenomas were evaluated. The criterion value was determined by the maximum value of Youden’s index (sensitivity + specificity – 1).