Table 4.

Statistics for demographic and cognitive variables for the non-cognitive impaired alternate sample of participants (N = 113)

	Alternate sample n = 113
Age (years)
Mean (SD)	79.67 (7.09)
Range	60–93
Education (years)
Mean (SD)	15.34 (3.15)
Range	8–28
MMSE (total score)
Mean (SD)	28.89 (1.18)
Range	25–30
Sex
% Female	77.6 (n = 90)
Race
% White	94.8 (n = 110)
Global Cognition (z-score)	0.44 (0.43)
Episodic Memory (z-score)	0.56 (0.51)
Semantic Memory (z-score)	0.45 (0.51)
Working Memory (z-score)	0.31 (0.65)
Processing Speed (z-score)	0.36 (0.69)
Perceptual Organization (z-score)	0.39 (0.62)

Data are summarized as mean (standard deviation 5 SD) or as number (%). Age and education are presented in years; MMSE is total score; global cognition, episodic memory, semantic memory, working memory, processing speed, and perceptual organization are presented as z-scores.