Main characteristics of the main study sample and the secondary study sample.

Abbreviations: ApoE, apolipoprotein E; HSV, herpes simplex virus; Aβ, amyloid-beta; ND, not determined.
*Low educational level = short secondary school level or less.
†These genotyped markers of CR1 were considered dichotomously: at least one adenine (GA or AA), the minor allele, vs. no adenine purine base (GG) in haplotypes.
‡The genotyped marker of CLU rs9331888 was considered dichotomously: at least one guanine (CG or GG), the minor allele, vs. no guanine purine base (CC) in haplotypes.
•These genotyped markers of CLU were considered dichotomously: at least one thymine (TC or TT), the minor allele, vs. no thymine pyrimidine base (CC) in haplotypes. Eleven data for CLU rs11136000 were missing.