Table 2.

The diagnostic performance of MRI 4D Flow parameters in grading NAFLD.

Parameter		AUC	95%CI	SPE	SEN	NPV	PPV
Peak velocity	G0 vs G1-3	0.69	0.57–0.82	0.57	0.93	0.77	0.85
	G0-1 vs G2-3	0.70	0.60–0.79	0.71	0.73	0.79	0.64
	G0-2 vs G3	0.57	0.44–0.69	0.26	1.00	1.00	0.19
Mean velocity	G0 vs G1-3	0.84	0.76–0.92	0.89	0.79	0.62	0.95
	G0-1 vs G2-3	0.78	0.69–0.86	0.59	0.96	0.96	0.62
	G0-2 vs G3	0.70	0.60–0.79	0.56	0.89	0.97	0.25
Area	G0 vs G1-3	0.79	0.70–0.87	0.69	0.76	0.52	0.86
	G0-1 vs G2-3	0.78	0.70–0.86	0.48	0.92	0.90	0.56
	G0-2 vs G3	0.84	0.76–0.92	0.59	1.00	1.00	0.29

AUC, Area Under the Curve; CI, Confidence Interval; SEN, Sensitivity; SPE, Specificity; NPV, Negative Predictive Value; PPV, Positive Predictive Value; US, Ultrasound.