. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: Neurobiol Learn Mem. 2015 May 5;129:113–119. doi: 10.1016/j.nlm.2015.04.011

Table 1.

Mean (standard deviation) demographic data, total Dementia Rating Scale (DRS) scores, and Long Delay Free Recall (LDFR) age-corrected z-scores for young, older e4−, unimpaired older e4+, and impaired older e4+ adults.

	Young	Older ε4−	Unimpaired Older ε4+	Impaired Older ε4+
n	57	19	13	11
Age (years)	19.61 (2.02)	74.72 (6.25)	73.00 (3.89)	76.89 (9.36)
Gender (%female)	64.91	57.89	46.15	54.55
Education (years)	13.07 (.96)	15.84 (2.36)	16.54 (2.18)	14.73 (2.96)
DRS Total	N/A	140.53 (2.86)	140.77 (2.62)	138.00 (3.61)
LDFR	−.49 (1.36)	.95 (1.00)	1.12 (.93)	−1.03 (.70)