Table 1.

Participant characteristics (mean and standard deviation or percentages are presented)

Variable	Total	Intact	MCI	p-value
N	28	21	7
Age at baseline (y)	82.0 (7.5)	82.0 (6.3)	81.8 (11.0)	0.92
Gender (% female)	61%	71%	29%	0.08
Education (y)	15.6 (3.4)	15.5 (3.4)	15.9 (3.4)	0.98
MMSE	28.6 (1.5)	28.8 (1.5)	28.0 (1.6)	0.20
Global cognitive z-score	0.1 (0.7)	0.2 (0.6)	−0.4 (0.9)	0.05
Executive function z-score	0.3 (1.0)	0.4 (0.9)	−0.3 (1.0)	0.08
Working memory z-score	−0.4 (1.3)	−0.3 (1.2)	−0.8 (1.4)	0.44
Attention z-score	−0.02 (0.76)	0.0 (0.8)	−0.1 (0.8)	0.73
Memory z-score	0.1 (1.0)	0.3 (0.7)	−0.8 (1.3)	0.06
Visuospatial z-score	0.4 (0.8)	0.6 (0.7)	−0.4 (0.7)	<0.01**
Geriatric Depression Scale	0.8 (1.1)	0.5 (0.8)	1.6 (1.4)	0.06
Functional Assessment Questionnaire	1.0 (2.1)	0.4 (1.1)	3.0 (3.5)	0.05
Reside in a retirement community (%)	50%	62%	14%	0.08
Living alone (%)	68%	76%	43%	0.17
Miles from nearest freeway	1.8 (1.7)	1.9 (1.9)	1.6 (1.0)	0.77

^**p < 0.01.