Table 1.

Clinical and demographic measures.

				p Value
Characteristic	CN (n = 118)	MCI (n = 44)	AD (n = 28)	CN vs. AD	CN vs. MCI	MCI vs. AD
Age, mean (SD), y	72.3 (5.7)	73.2 (5.4)	67.4 (8.9)	<0.001	0.70	0.03
Male, No. (%)	36 (30.5)	21 (47.7)	12 (42.9)	0.21	0.03	0.62
Education, mean (SD), y	15.5 (3.6)	14.1 (3.4)	15.0 (3.7)	0.54	0.07	0.46
CDR score, mean (SD)	0.0 (0)	0.5 (0)	0.9 (0.5)	<0.001	n/a	<0.001
MMSE score, mean (SD)	29.2 (0.9)	28.0 (1.8)	20.9 (5.9)	<0.001	<0.001	<0.001
MBI score, mean (SD)	2.3 (5.5)	7.6 (8.5)	13.0 (9.8)	<0.001	<0.001	0.04
Tau-positive, No. (%)	10 (8.5)	22 (48.9)	25 (89.3)	<0.001	<0.001	<0.001

p values are from t-tests for continuous measures and chi-square tests for categorical measures.