JAMA NetworkEstimating the Prevalence of Dementia and Mild Cognitive Impairment in the US

At the time of this study, in 2016, dementia was seen in 10% of those over age 65 in the US, and mild cognitive impairment (MCI) in 20%, with increased risk for every 5 year advance in age. Risk was 80% higher for non-Hispanic Black individuals and approximately 40% higher in Hispanic persons, compared with White individuals. Dementia and MCI were inversely correlated with years of education, though.