The two groups (AD high risk, N = 13; AD low risk, N = 14) were similar for age (p = 0.56), education in years (p = 0.87), gender (p = 0.17), ApoE genotype (p = 0.15) MMSE scores (p = 0.31), and white matter lesions load (p = 0.88; Table 2). Here, APOE is linked to Alzheimer disease.