Table 2:

ROC results of all normalized diffusion metrics for differentiating low- from high-grade meningiomas

Metrics	AUC	Cutoff	Sensitivity	Specificity	Youden	PPV	NPV
MK	0.842	0.99	95.24	66.67	61.91	95.2	66.7
AK	0.830	0.965	66.67	83.33	50.00	96.6	26.3
RK	0.817	0.981	97.62	58.33	55.95	94.3	77.8
FA	0.493	0.743	33.33	83.33	16.66	93.3	15.2
MD	0.769	1.114	71.43	75.00	46.43	95.2	27.3
ADC	0.781	1.045	89.29	58.33	47.62	93.7	43.8

Note:—AUC indicates area under the curve; Cutoff, cutoff value; Youden, Youden index; ROC, receiver operating characteristic; PPV, positive predictive value; NPV, negative predictive value.