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Elevated Depression Symptoms, Antidepressant Medicine Use and Risk of Developing Diabetes during the Diabetes Prevention Program

From the ¹Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland
² Department of Pediatrics, The Johns Hopkins University School of Medicine, Baltimore, Maryland
³ Biostatistics Center, George Washington University, Rockville, Maryland
⁴ Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
⁵ Department of Sociology, Loyola College of Maryland, Baltimore, Maryland
⁶ Department of Family and Preventative Medicine, University of California at San Diego, La Jolla, California
⁷ Department of Medicine, University of Washington, Seattle Washington
⁸ Department of Medicine, Clinical Epidemiology, University of Texas Health Science Center, San Antonio, Texas
⁹ Department of Family Medicine, University of Colorado Denver School of Medicine, Denver, Colorado
¹⁰ The National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona

rrubin4{at}jhmi.edu

ABSTRACT

Objective: To assess the association between elevated depression symptoms or antidepressant medicine use on entry to the Diabetes Prevention Program (DPP) and during the study, and the risk of developing diabetes during the study.

Methods: DPP participants (N= 3187) in 3 treatment arms [intensive lifestyle (ILS), metformin (MET), placebo (PLB)] completed the Beck Depression Inventory (BDI) and reported their use of antidepressant medicines, at randomization and throughout the study (average duration in study = 3.2 yr).

Findings: When other factors associated with the risk of developing diabetes were controlled, elevated BDI scores at baseline or during the study were not associated with diabetes risk in any arm. Baseline antidepressant use was associated with diabetes risk in the PLB [Hazard Ratio (HR) = 2.25 (95% CI: 1.38-3.66) and ILS [HR= 3.48 (95% CI: 1.93-6.28)] arms. Continuous antidepressant use during the study (compared with no use) was also associated with diabetes risk in the same arms [PLB HR= 2.60 (95% CI: 1.37-4.94), ILS HR= 3.39 (95% CI: 1.61-7.13], as was intermittent antidepressant use during the study in the ILS arm [HR= 2.07 (95% CI: 1.18-3.62)]. Among MET arm participants, antidepressant use was not associated with developing diabetes.

Conclusions: A strong and statistically significant association between antidepressant use and diabetes risk in the PLB and ILS arms was not accounted for by measured confounders or mediators. If future research finds that antidepressant use independently predicts diabetes risk, efforts to minimize the negative effects of antidepressant agents on glycemic control should be pursued.

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