Comorbidity of Type 2 Diabetes and Dementia among Hospitalized Patients in Los Angeles County: Hospitalization Outcomes and Costs, 2019–2021

Abstract

Hospitalizations for diabetes and dementia can impose a significant health and economic toll on older adults in the United States. This study sought to examine differences in hospitalization characteristics and outcomes associated with diabetes and dementia, separately and together, using 2019–2021 discharge record data from the California Department of Health Care Access and Information. The sampled group were residents of Los Angeles County who were aged 50+ at the time of the study. The multivariable linear regression analysis showed that compared to those with no diabetes or dementia, patients with diabetes alone exhibited the highest total charges, while those with comorbid diabetes and dementia exhibited lower charges (p < 0.05). The multinomial logistic regression found that patients with comorbid diabetes and dementia had the highest odds of having a length of stay of 7+ days (Adjusted Odds Ratio = 1.49; 95% Confidence Interval (CI) = 1.44–1.53). A matched case–control analysis revealed that comorbid diabetes and dementia were associated with significantly lower odds of hypertensive disease than diabetes alone (Matched Odds Ratio = 0.81; 95% CI = 0.67–0.97). Collectively, these results highlight the complex factors that may influence the variable hospitalization outcomes that are common occurrences in these three distinct disease profiles. Study findings suggest a need to consider these complexities when developing policies or strategies to improve hospitalization outcomes for these conditions.