Association of Weight Status With Mortality in Adults With Incident Diabetes

作者:Carnethon, Mercedes R.*; De Chavez, Peter John D.; Biggs, Mary L.; Lewis, Cora E.; Pankow, James S.; Bertoni, Alain G.; Golden, Sherita H.; Liu, Kiang; Mukamal, Kenneth J.; Campbell-Jenkins, Brenda; Dyer, Alan R.
来源:JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 2012, 308(6): 581-590.
DOI:10.1001/jama.2012.9282

摘要

Context Type 2 diabetes in normal-weight adults (body mass index [BMI] <25) is a representation of the metabolically obese normal-weight phenotype with unknown mortality consequences. @@@ Objective To test the association of weight status with mortality in adults with new-onset diabetes in order to minimize the influence of diabetes duration and voluntary weight loss on mortality. @@@ Design, Setting, and Participants Pooled analysis of 5 longitudinal cohort studies: Atherosclerosis Risk in Communities study, 1990-2006; Cardiovascular Health Study, 1992-2008; Coronary Artery Risk Development in Young Adults, 1987-2011; Framingham Offspring Study, 1979-2007; and Multi-Ethnic Study of Atherosclerosis, 2002-2011. A total of 2625 participants with incident diabetes contributed 27 125 person-years of follow-up. Included were men and women (age >40 years) who developed incident diabetes based on fasting glucose 126 mg/dL or greater or newly initiated diabetes medication and who had concurrent measurements of BMI. Participants were classified as normal weight if their BMI was 18.5 to 24.99 or overweight/obese if BMI was 25 or greater. @@@ Main Outcome Measures Total, cardiovascular, and noncardiovascular mortality. @@@ Results The proportion of adults who were normal weight at the time of incident diabetes ranged from 9% to 21% (overall 12%). During follow-up, 449 participants died: 178 from cardiovascular causes and 253 from noncardiovascular causes (18 were not classified). The rates of total, cardiovascular, and noncardiovascular mortality were higher in normal-weight participants (284.8, 99.8, and 198.1 per 10 000 person-years, respectively) than in overweight/obese participants (152.1, 67.8, and 87.9 per 10 000 person-years, respectively). After adjustment for demographic characteristics and blood pressure, lipid levels, waist circumference, and smoking status, hazard ratios comparing normal-weight participants with overweight/obese participants for total, cardiovascular, and noncardiovascular mortality were 2.08 (95% CI, 1.52-2.85), 1.52 (95% CI, 0.89-2.58), and 2.32 (95% CI, 1.55-3.48), respectively. @@@ Conclusion Adults who were normal weight at the time of incident diabetes had higher mortality than adults who are overweight or obese.