Table 1.

Demographic, neuropsychological, neuropsychiatric, and functional data for the normal control (NC) and mild cognitive impairment (MCI) cohorts. Standard deviations are shown in parentheses. Scattered data points were missing for some variables, resulting in different degrees of freedom (df) for different comparisons.

	NC	MCI	t/χ2	p
N	97	108	--	--
Demographics
Age	70.1 (8.6)	72.0 (9.5)	−1.53a	0.13
Years of education	16.5 (2.9)	15.9 (3.1)	1.56a	0.12
MMSE	28.8 (1.3)	27.1 (2.6)	5.73a	<0.001
% Male	53.6%	43.5%	2.08a	0.15
% Caucasian	77.3%	72.2%	0.70a	0.40
Cognitive Performance
Executive/Speed z	0.05 (0.70)	−0.90 (1.37)	6.03b	<0.001
Memory z	−0.02 (0.97)	−1.32 (1.20)	8.36c	<0.001
Language z	0.09 (0.65)	−0.48 (0.86)	5.26d	<0.001
Attention z	0.01 (0.83)	−0.45 (0.90)	3.79e	<0.001
Composite Cognitive z	0.04 (0.51)	−0.78 (0.81)	8.33f	<0.001
Neuropsychiatric Symptoms
NPI full scale score	1.59 (4.17)	3.89 (8.32)	−2.43c	0.016
GDS	1.85 (3.16)	2.44 (3.16)	−1.34e	0.18
Functional Abilities
Avg FAQ item	0.06 (0.24)	0.16 (0.24)	−3.17e	0.002

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^fdf=190