Evaluation of the Obesity Paradox in Diabetes: A Longitudinal Case-Control Study of Half a Million Patients

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Obesity is a risk factor for developing diabetes. However, recent studies reported increased mortality risk associated with normal body weight in people with incident diabetes compared to overweight or obese patients. This “obesity paradox”, where being overweight appears to be protective, is new in diabetes. The mechanism behind this is not known. Using 20 years of follow-up data on 500,000 diabetes and control patients, this study proposes to find possible explanations behind obesity paradox.