In this analysis, only the 4th quartile showed marginally significant association with having vascular dementia (p = 0.055, OR = 1.483), whereas sex (OR = 1.637, p<0.001), cardiovascular problems (OR = 2.076, p<0.001) and APOE ε4 (OR = 0.609, p<0.001) possession were significantly associated with vascular dementia (Table 5). This evidence concerns the gene APOE and vascular dementia.