Cognitive behavior therapy for depression in type 2 diabetes mellitus. A randomized, controlled trial

Area of Science:

• Psychiatry
• Endocrinology
• Clinical Psychology

Background:

• Psychotherapy is a primary nonpharmacologic depression treatment, but its efficacy in diabetic patients is unclear.
• Depression is a common comorbidity in diabetes, potentially worsening glycemic control and quality of life.

Purpose of the Study:

• To evaluate the effectiveness of cognitive behavior therapy (CBT) as a nonpharmacologic intervention for major depression in individuals with type 2 diabetes.

Main Methods:

• A randomized controlled trial was conducted at an academic medical center.
• 51 patients with type 2 diabetes and major depression were randomized to either 10 weeks of individual CBT or a control group.
• Depression severity (Beck Depression Inventory) and glycemic control (glycosylated hemoglobin) were assessed post-treatment and at 6-month follow-up.

Main Results:

• A significantly higher percentage of patients in the CBT group achieved depression remission compared to the control group at both post-treatment (85.0% vs 27.3%) and follow-up (70.0% vs 33.3%).
• While post-treatment glycosylated hemoglobin levels did not differ, follow-up levels were significantly lower in the CBT group (9.5%) than in the control group (10.9%).

Conclusions:

• Combining cognitive behavior therapy (CBT) with supportive diabetes education offers an effective nonpharmacologic treatment for major depression in type 2 diabetes patients.
• This combined approach may also lead to improvements in glycemic control.