Treatment Implications for Comorbid Diabetes Mellitus and Depression Major depression and type 2 diabetes mellitus are common chronic illnesses within the general US population, with prevalence rates of approximately 5% to 10% and 11%, respectively.1,2 Moreover, depression and type 2 diabetes mellitus, individually, can be among the most disabling chronic disorders one can acquire, and when they occur comorbidly, they are even more detrimental. Together they exhibit a bidirectional relationship, with each disease an independent risk factor for development of the other.
Diabetes-Related Risk Factors and Cognitive Aging Researchers from more than 2 dozen large-scale epidemiological studies have reported a link between type 2 diabetes mellitus and cognitive impairment, cognitive decline, and dementia.