Table 1.

Comparison of Imaging Study Participants to all MCSA Participants

Characteristic	All MCSA CN Participants (n = 2399)	Study Participants (n = 430)
Age, years, median (IQR)	78 (74, 83)	78 (75, 83)
Female gender, no. (%)	1195 (50)	194 (45)
Education, years, median (IQR)	13 (12, 16)	14 (12, 16)
APOE ε4 positive no. (%)	586 (25)	119 (28)
Mini-Mental State Examination score, median (IQR)	28 (27, 29)	28 (27, 29)
Cognitive Z-scores, median (IQR)
Global	0.12 (−0.54, 0.81)	0.51 (−0.12, 1.17)
Memory	0.03 (−0.71, 0.77)	0.51 (−0.27, 1.26)
Language	0.13 (−0.53, 0.72)	0.34 (−0.31, 0.96)
Executive	0.21 (−0.49, 0.77)	0.46 (−0.27, 1.05)
Visuospatial	0.12 (−0.60, 0.73)	0.50 (−0.15, 1.10)

APOE = apolipoprotein E; IQR = interquartile range