Mental health comorbidity and youth onset type 2 diabetes: A systematic review of the literature.

Background: Type 2 diabetes (T2D) is a burgeoning epidemic in children and adolescents. Adult T2D doubles the risk of depression and mental health comorbidity, makes it more difficult to make the lifestyle, medication adherence and health behavior changes needed to optimize outcomes. There is limited research on the impact of depression and depressive symptoms on youth T2D.
Methods: A search of the literature in the last 10 years regarding youth with depression and T2D was conducted. Abstracts were screened by 2 randomly assigned authors for inclusion, and disagreement was resolved by a third author. Selected full-text articles were divided among all authors for review.
Results: 13 publications from 8 studies (N=2244, age 6-17) were included. 6 of 13 publications utilized Treatment Options for Type 2 Diabetes in Youth (TODAY) study data. While studies included evaluation of depressive symptoms, most did not formally assess for major depressive disorder (MDD) and excluded participants with a previous diagnosis of MDD. Depressive symptoms were common in this population and were associated with negative T2D outcomes.
Conclusions: While there is a growing body of adult literature highlighting the extensive relationship between T2D and mental health, there is a dearth of data in youth. Future studies are needed that include, 1.) youth with diagnosed MDD, 2.) treatment studies of both T2D and MDD, 3.) larger, more racially diverse samples of youth with T2D, and 4.) studies that evaluate the impact of social determinants of health, including mental health comorbidity on outcomes of T2D.