Association Between Race and Comorbid Conditions Among Older Adults with Dementia

Background/Objective: Dementia is estimated to affect over 150 million individuals by 2050. Individuals with dementia commonly suffer from other comorbid conditions which can affect quality of life and result in increased health care expenditures. We conducted this study to determine the frequency of comorbid conditions between representative samples of non-Hispanic Black and White US adults aged ≥65 with dementia. Methods: This cross-sectional study was conducted on non-Hispanic Black and White adults aged 65 and older with dementia whose data were retrieved from the National Hospital Ambulatory Medical Care Survey, 2016-2021, and the National Ambulatory Medical Care Survey, 2016, 2018, and 2019. Dementia was defined based on medical record abstraction. The exposure was Black vs. White race. The outcome was a sum of 13 comorbid conditions, including obesity, hypertension, cancer, cerebrovascular disease, congestive heart failure, and coronary artery disease, assessed in older adults with dementia. Results: A total of 1354 non-Hispanic (1175 White and 179 Black) participants were studied. The mean number of comorbid conditions, as well as the prevalence of obesity, cerebrovascular disease, congestive heart failure, and coronary artery disease, was significantly (p <  0.01) higher in the Black vs. White study participants. The Black participants were more likely to have more than two comorbid conditions relative to those who were White (odds ratio 2.5; 95% confidence interval 1.6 to 3.7). Conclusions: A higher burden of comorbid conditions was observed among non-Hispanic Blacks compared to non-Hispanic White older adults with dementia. Future studies should examine the quality of life and health care utilization implications of this finding.