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Eighty morbidly obese patients who had had gastric bypass operations were interviewed for psychiatric diagnoses using DSM-III criteria. The lifetime prevalence of Axis I clinical psychiatric diagnoses was 47.5%, with depressive disorders occurring in 28.7% of the total sample. No other diagnosis exceeded a 2.5% prevalence. The authors believe there is no evidence of an increased prevalence of major psychiatric disorder in obese persons when strictly defined diagnostic criteria are used.
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