Table 1: Demographic characteristics.

CharacteristicHCMCIAD

Male/female8/84/48/8
Age (years, mean ± SD)70.3 ± 4.1M,A77.3 ± 3.6H78.8 ± 4.7H0.0002*
ApoE ε4 carrier6%62%62%0.002§
Education level (undergraduate/
graduate)
50%/50%87%/13%62%/38%0.202§

* Kruskal-Wallis test, contrasts with Mann-Whitney test. H, M, and A mean significant with regard to HC, MCI, and AD, respectively. §Chi-square test.