Table 1.

Demographic and cognitive characteristics of populations at baseline.

Characteristic	Normal	MCI
N	215	364
Age, mean ± SD, years	76.0 ± 5.1	74.9 ± 7.1
% Female	47.9%	36.3%
Race, n (%)
Asian	3 (1.4%)	9 (2.5%)
African American	14 (6.5%)	12 (3.3%)
Caucasian	198 (92.1%)	343 (94.2%)
Ethnicity, n (%) Hispanic	2 (0.95%)	12 (3.3%)
Education, mean ± SD, years	16.1 ± 2.8	15.8 ± 3.0
ApoE genotype, % carriers	27.0	53.8
MMSE, mean ± SD	29.1 ± 1.0	27.0 ± 1.8
CDR global, mean ± SD	0.0 ± 0.0	0.5 ± 0.0
CDR-sb, mean ± SD	0.0 ± 0.1	1.6 ± 0.9
ADAS11, mean ± SD	6.1 ± 2.9	11.5 ± 4.5
ADAS12, mean ± SD	8.9 ± 4.1	17.6 ± 6.1
RAVLT total, mean ± SD	43.6 ± 9.2	30.9 ± 9.2
RAVLT delay, mean ± SD	7.5 ± 3.7	2.9 ± 3.3