Power MC, Bennett EE, Turner RW, et al. - In the US from 2000 to 2016, experts explored if relative racial disparities in dementia prevalence or incidence have changed in this cohort study that assessed multiple waves of the Health and Retirement Study. From the 2000 to 2016 waves, non-Hispanic White and non-Hispanic Black participants aged 70 and older provided data for this cohort analysis. In non-Hispanic White and Black participants, dementia status was assessed using three algorithms of comparable sensitivity and specificity. According to results, dementia prevalence and incidence was significantly higher in non-Hispanic Black people than in non-Hispanic White people. Prevalence ratios comparing Black and White candidates ranged from nearly 1.5 to 1.9 across algorithms and years, while hazard ratios ranged from about 1.4 to 1.8. This research found no evidence that, in the US between 2000 and 2016, the dementia risk ratio across Black and White people changed. More work is needed to define and address the causes of these inequalities.