Demographics and neuropsychological characteristics.

Note: No differences were found in gender, age, education, RAVLT delayed recall, digit span, trail-making A and B, and Beck depression scores between the APOE-ε4 carriers and noncarriers. Abbreviation: M, mean; SD, Standard Deviation; RAVLT, Rey Auditory Verbal Learning Test; NS, no significance;†p value was obtained by χ2 two-tailed test;*p values were obtained by an independent-sample two-tailed t test. Unless otherwise indicated, data are presented as mean ± SD.