Table 1.

Demographics

	Normal N = 175	CIND N = 76	Dementia N = 48	Test Value	P value
Time in Study (days)	2727.4 (1766.8)	2884.6 (1746.6)	2342.1 (1492.9)	F = 1.50	0.23
Age (years)	66.7 (6.11)	68.6 (6.32)	74.0(6.39)	F = 25.59	< 0.01
Education (years)	14.83 (6.12)	13.92(2.82)	13.41(3.18)	F = 7.11	< 0.01
Baseline MMSE	28.77 (1.47)	28.06 (1.71)	26.74 (3.55)	F = 18.54	< 0.01
Baseline MADRS	22.00 (7.77)	25.00 (8.63)	28.7 (8.33)	F=14.04	< 0.01
Sex (%F)	N = 104 (59.43%)	N =44 (57.89%)	N = 34 (70.83%)	x2 = 2.44	0.30
Race (%W)	N = 150 (85.71%)	N = 60 (78.95%)	N = 39 (81.25%)	x2 = 1.91	0.38

Continuous variables presented as mean (SD), with differences between groups examined using ANOVA. Models for each continuous variable had two degrees of freedom, with the model having 298 degrees of freedom. Mini-Mental State Exam (MMSE) data was not available for 22 subjects. The MMSE model had 2 degrees of freedom, with the model having 299. Categorical variables presented as N (%) with two degrees of freedom. MADRS = Montgomery-Asberg Depression Rating Scale.