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. Author manuscript; available in PMC: 2010 Jan 8.
Published in final edited form as: J Int Neuropsychol Soc. 2009 Jul;15(4):558–569. doi: 10.1017/S1355617709090857

Table 1.

Demographic Characteristics of the Three Samples

Demographics
Sample 1 Sample 2 Sample 3
Mean (SD) Range Mean (SD) Range Mean (SD) Range
N 365 431 136
Age 73.82 (8.56) 53 – 95 69.41 (7.16) 54 – 97 38.27 (19.62) 20 – 81
Educ(years) 13.47 (3.63) 1 – 20 7.40 (4.45) 0 – 20 16.35 (1.87) 12 – 22
MMSE 28.07 (2.22) 18 – 30 26.13 (3.44) 11 – 30 _ _
% Female 55.30% 61.5% 49.30%
Ethnicity
 White 143 (39.2%) 1 (0.2%) 78 (57.4%)
 Black 168 (46.0%) 0 (0.0%) 23 (16.9%)
 Other 25 (6.8%) 0 (0.0%) 24 (17.6%)
 Hispanic 29 (7.9%) 430 (99.8%) 11 (8.1%)