Table 3.

AUC, cut-off values, and diagnostic index for discriminating among MSA-P patients, PSP patients, and other groups

		AUC	CV	%
				Sensitivity	Specificity	PPV	NPV	Accuracy
Putamen	MSA-P vs. PSP	0.83	0.23	100	62	100	71	82
	MSA-P vs. control	0.91	0.56	69	100	76	100	85
Red nucleus	PSP vs. MSA-P	0.87	0.67	92	75	90	80	83
	PSP vs. PD	0.90	0.68	100	75	100	80	88
	PSP vs. control	0.89	0.78	77	92	79	91	85

AUC, area under the curve; CV, cut-off value; MSA-P, Parkinsonian variant of multiple system atrophy; NPV, negative predictive value; PD, Parkinson’s disease; PPV, positive predictive value; PSP, progressive supranuclear palsy.