Table 4.

ROC curve parameters

Predictor variable	Area under curve (AUC)	Confidence interval (CI)	Sensitivity (%)	Specificity (%)	Youden index (%)
Focus diameter	0.752	0.681-0.823	80.00	70.37	50.37
Microcalcification	0.598	0.333-0.471	40.00	79.63	19.63
Multiple foci	0.663	0.263-0.410	8640	46.29	32.69
PI	0.690	0.612-0.768	42.40	90.74	33.14
TTP	0.855	0.798-0.912	63.20	92.59	55.79
MTT	0.769	0.695-0.844	76.00	68.51	44.51

Note: PI: Peak intensity; TTP: Time to peak; MTT: Mean transit time; ROC: receiver operating characteristic.