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  • Title: Overweight and obesity affect treatment response in major depression.
    Author: Kloiber S, Ising M, Reppermund S, Horstmann S, Dose T, Majer M, Zihl J, Pfister H, Unschuld PG, Holsboer F, Lucae S.
    Journal: Biol Psychiatry; 2007 Aug 15; 62(4):321-6. PubMed ID: 17241618.
    Abstract:
    BACKGROUND: Epidemiologic and clinical studies suggest comorbidity between major depressive disorder (MDD) and obesity. To elucidate the impact of weight on the course of depression beyond comorbidity, we investigated psychopathology, attention, neuroendocrinology, weight change, and treatment response in MDD patients, depending on their weight. METHODS: Four hundred eight inpatients with MDD participated in the Munich Antidepressant Response Signature Study, designed to discover biomarkers and genotypes that are predictive for clinical outcome. Psychopathology and anthropometric parameters were monitored weekly in 230 patients. In subsamples, combined dexamethasone-corticotropin-releasing hormone and attention tests were conducted at admission and discharge. One thousand twenty-nine diagnosed matched controls served for morphometric comparisons. RESULTS: Patients with MDD had a significantly higher body mass index (BMI) compared with healthy controls. Patients with high BMI (> or =25) showed a significantly slower clinical response, less improvement in neuroendocrinology and attention, and less weight gain than did patients with normal BMI (18.5 < or = BMI < 25) during antidepressant treatment. CONCLUSIONS: Our findings suggest that overweight and obesity characterize a subgroup of MDD patients with unfavorable treatment outcome.
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