Table 2. Accuracy of praxis instruments for levels of clinical dementia rating (CDR). CDR = 0, no dementia; CDR = 1, mild; CDR = 2, moderate.

CDR	Instruments	AUC	P	95% CI	Sensitivity	Specificity	Cutoff point
0-1	Total praxis	0.82	0.0001	0.742-0.900	0.64	0.85	9
	Constructive praxis	0.88	0.00	0.808-0.946	0.88	0.71	5
	Ideomotor praxis	0.56	0.29	0.453-0.665	0.69	0.44	4
0-2	Total praxis	0.92	0.0001	0.854-0.980	0.78	0.94	8
	Constructive praxis	0.93	0.0001	0.875-0.995	0.81	0.96	3
	Ideomotor praxis	0.57	0.21	0.452-0.697	0.31	0.85	3
1-2	Total praxis	0.74	0.0001	0.623-0.856	0.59	0.79	7
	Constructive praxis	0.74	0.0001	0.624-0.863	0.56	0.88	2
	Ideomotor praxis	0.53	0.69	0.389-0.667	0.19	0.98	2

AUC = area under the curve; CI = confidence interval.