There was a significant association of increasing age (PR=1.99; 95% CI 1.76-2.26),family history of dementia (PR=1.61; 95% CI 1.28-2.04) and APOE ε4 genotype(PR 2.53; 95% CI, 2.02-3.17), with an increased prevalence of 10/66 dementia.Education level (PR 0.80; 95% CI 0.72-0.89) was inversely associated. This evidence concerns the gene APOE and dementia.