Evaluation of cerebrospinal fluid flow dynamic changes in patients with idiopathic intracranial hypertension using phase contrast cine MR imaging

Table 3 Validity of CSF flowmetry and opening pressure in differentiating cases and control

Test result variable(s)	AUC	95% confidence interval		Cutoff point	Sensitivity	Specificity	PPV	NPV	Accuracy
Test result variable(s)	AUC	Lower bound	Upper bound	Cutoff point	Sensitivity	Specificity	PPV	NPV	Accuracy
PSV	0.628	.422	.833	≥ 2.65	83.3%	60.0%	86.2%	54.5%	77.5%
PDV	0.628	.431	.825	≥ 2.15	76.7%	50.0%	82.1	41.7	70.0%
SV	0.543	.347	.738	≥ 24.25	56.7%	50.0%	77.3%	27.8%	55%
MF	0.583	.397	.769	≥ 0.1188	56.7%	80.0%	69.5%	38.1%	62.5%
Area	0.568	.365	.772	≤ 0.043	70.0%	50.0%	80.8%	35.7%	65%
Opening pressure	1.000	1.000	1.000	≥ 26.0	92.6%	100.0%	100%	83.3%	94.6%

AUC area under the curve, NPV negative predictive value, PPV positive predictive value, PSV peak systolic velocity (cm/s), PDV peak diastolic velocity (cm/s), SV stroke volume (ml/min), aqueductal area (cm²), MF mean flow (cm³/s)