Diabetes disparities in diabetes health care access and outcomes during the COVID-19 pandemic in the United States.

Objectives: To investigate the impact of COVID-19 on hospitalization and consequent diabetes-related complications in patients with type 2 diabetes mellitus (diabetes).

Methods: We conducted a retrospective cohort study of patients with diabetes. Interrupted time series analysis (ITS) was used to analyze the monthly trends in diabetes-related hospitalization rates, including short- and long-term complications, 1-year before and after onset of COVID-19.

Results: Persons with diabetes experienced a significant (p < 0.001) rapid drop in monthly hospital admission rates at onset of COVID-19, then rose significantly (p = 0.003) to higher than pre-COVID-19 levels. Older age, lower education, and income levels were associated with higher base-level monthly hospital admission rates and a greater rate reduction at COVID-19 onset. ITS analysis showed monthly hospital admission rates from short-term complications surged to higher level 6 months after COVID-19 onset. Hospital admissions due to long-term complications decreased immediately post-COVID-19, but rose significantly (p < 0.001) to higher than pre-COVID levels, with patients experiencing higher nephropathy, angiography, and dermatological complications post-COVID-19.

Conclusion: COVID-19 had a negative impact on diabetes-related hospitalization access, resulting in increased short- and long-term complications. Long-term effects of deferred care due to COVID-19 on diabetes-related complications may persist, emphasizing the need for continued education toward improved diabetes self-management.