The Effects of Weight Change on the Dexamethasone Suppression Test in Depressed and Anorexic Patients

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Abstract
Prior studies on weight change and hypothalmic-pituitary-adrenal (HPA) axis functioning are reviewed. Data on 58 depressed and eight anorexic patients is presented. No significant difference in the frequency of cortisol non-suppression in the dexamethasone suppression test (DST) was found between depressed patients with a history of weight loss and those without, nor between depressed patients who lost weight during their first week in hospital and those who did not. Mean weight loss of suppressors did not significantly differ from that of non-suppressors. Of 12 patients whose DST normalised during their stay in hospital, only four gained weight. Five anorexics who were non-suppressors were <70% of their ideal body weight (IBW), while three suppressor anorexics were ≧70% IBW. These results indicate that mild to moderate weight change is not a significant influence on DST response in depression.

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