APOE and dementia: We found that among the 271 dementia-associated CpGs (44 significant individual CpGs, 233 CpGs located in significant DMRs, and 6 overlapping CpGs), 43 CpGs are associated with number of APOE4 alleles, 28 CpGs are associated with smoking status, and 6 CpGs are associated with years of education.