Table 3:

Diagnostic discrimination of iNPH patient group from other subject groups

Variable	Sensitivity	Specificity	Positive Predictive Value	Negative Predictive Value	Cutoff Value of Each Measure	Area Under Curve
FA value
Compared with AD	94	82	89	90	0.59	0.92
Compared with PDD	94	72	85	89	0.59	0.89
Compared with control	94	84	85	94	0.59	0.91
Compared with AD, PDD, and control	94	80	68	97	0.59	0.91
Axial eigenvalue
Compared with AD	94	82	89	90	1.52	0.95
Compared with PDD	100	82	90	100	1.48	0.96
Compared with control	100	84	86	100	1.50	0.98
Compared with AD, PDD, and control	94	83	71	97	1.52	0.97

Note:—Data (except for the cutoffs of FA values and axial eigenvalues) are shown as percentages. Receiver operating characteristic analysis was used to determine the optimum cutoff values for evaluating the usefulness of FA values and axial eigenvalues in differentiating iNPH from AD, PDD, and controls.