. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Neuropsychology. 2013 Nov 11;28(1):123–134. doi: 10.1037/neu0000039

Table 1.

Baseline demographic mean (standard deviations) for full analytic sample and by cognitive status group

	Full Sample (N=2,799)	Amnestic (N=225)	Non-Amnestic (N=703)	Unimpaired (N=1872)	F- statistic/χ²^§	df	p- value	η_p²
BL Age	74.11(5.90)	75.09 (6.91)^a	74.25 (6.14)^ab	73.95 (5.67)^b	3.93	2, 2796	.020	.003
Education	13.53 (2.70)	13.43 (2.79)^a	13.46 (2.79)^a	13.56 (2.66)^a	0.54	2, 2796	.586	<.001
BL MMSE	27.31 (2.00)	26.10 (1.87)^a	26.53 (2.09)^b	27.75 (1.83)^c	155.45	2, 2796	<.001	.100
Female, n (%)	2124 (75.88%)	130 (57.78%)*	523 (74.50%)	1471 (78.58%)	43.89^§	2	<.001	-
AA, n (%)	727 (25.97%)	55 (24.44%)	198 (28.21%)	474 (25.32%)	2.48^§	2	.289	-

Note: Matching superscript letters indicate values are not significantly different, p>.05, using Bonferroni corrected one-way ANOVAs. Chi-squared tests were used to measure dichotomous variables and are denoted with superscript^§. Significant overall chi-square statistics were followed up with logistic contrasts, using the Unimpaired group as the reference value; significant differences after adjusting for the 2 comparisons to the reference group are denoted with superscript*. MMSE=Mini Mental State Exam (Folstein et al., 1975); AA=African American.