The APOE genotype is involved in atherosclerosis, and atherosclerosis incre
ases the risk of dementia, in particular among carriers of the APOE-epsilon
4 allele. We studied, in a population-based setting (244 dementia cases; 1
,002 nondemented controls), whether APOE is associated with dementia throug
h atherosclerosis. As neither adjusting nor stratification for atherosclero
sis altered the association of APOE with dementia, our study suggests that
atherosclerosis is not an intermediate factor.