. Author manuscript; available in PMC: 2010 Sep 14.

Published in final edited form as: J Neuropsychiatry Clin Neurosci. 2010 Winter;22(1):85–92. doi: 10.1176/appi.neuropsych.22.1.85

TABLE 4.

Sensitivity and Specificity of Dichotomous Ratings of Impairment

Clinicians Rating	Alzheimer’s Disease versus Comparison		MCI versus Comparison		Alzheimer’s Disease versus MCI		MCI + Alzheimer’s Disease versus Comparison

	Sensitivity	Specificity	Sensitivity	Specificity	Sensitivity	Specificity	Sensitivity	Specificity
Average^a	0.75	0.81	0.47	0.81	0.75	0.53	0.61	0.81
Majority^b	0.84	0.84	0.50	0.84	0.84	0.5	0.67	0.84

MCI=mild cognitive impairment; N=50 each for comparison, MCI, and Alzheimer’s disease group

Average values across the five raters

An abnormal rating was given if three or more raters agreed that the clock was abnormal.