Table 2.

Diagnostic performance of rSI measured by silent MRA to identify high-flow A–V shunt using DSA as a reference test

	AUC	Cut-off value	Sensitivity	Specificity	PPV	NPV
Total (n = 46)	0.885 [0.811, 0.960]	1.09	0.824 [0.558, 0.953]	0.828 [0.709, 0.907]	0.56 [0.353, 0.750]	0.946 [0.842, 0.986]
Treated (n = 20)	0.960 [0.882, 1.00]	0.88	1 [0.517, 1]	0.952 [0.741, 0.998]	0.857 [0.420, 0.992]	1 [0.800, 100]
Untreated (n = 26)	0.850 [0.735, 0.965]	1.09	0.818 [0.478, 0.968]	0.767 [0.610, 0.877]	0.474 [0.252, 0.705]	0.943 [0.794, 0.990]

95% confidence intervals are in brackets

DSA digital subtraction angiography, AUC area under the receiver operating characteristic curve, A–V shunt arteriovenous shunt, DSA digital subtraction angiography, MRA MR angiography, NPV negative predictive value, PPV positive predictive value, rSI ratio of signal intensity