From competing risk models, compared with APOE ε4 non-carriers, the proportion developing dementia (Table 3) was 26% higher among Blacks (46.3% prevalence, 95% CI: 38.3, 54.4%, among carriers vs. 36.6% prevalence, 95% CI: 33.5, 39.9%, among non-carriers). Here, APOE is linked to dementia.