Body Mass Index, Metabolic Syndrome, and Risk of Type 2 Diabetes or Cardiovascular Disease
James B. Meigs,
Peter W. F. Wilson,
Caroline S. Fox,
Ramachandran S. Vasan,
David M. Nathan,
Lisa M. Sullivan and
Ralph B. DAgostino
General Medicine Division and Department of Medicine (J.B.M.) and Diabetes Unit and Department of Medicine (D.M.N.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; Department of Endocrinology, Diabetes, and Medical Genetics (P.W.F.W.), Medical University of South Carolina, Charleston, South Carolina 29403; The National Heart, Lung, and Blood Institutes Framingham Heart Study and the Division of Endocrinology, Diabetes, and Hypertension (C.S.F.), Brigham and Womens Hospital, Harvard Medical School, Boston, Massachusetts 02115; The National Heart, Lung, and Blood Institutes Framingham Heart Study and the Evans Department of Medicine, Whitaker Cardiovascular Institute, and Preventive Medicine Section (R.S.V.), Boston University School of Medicine, Boston, Massachusetts 02215; and Department of Mathematics, Statistics, and Consulting Unit (L.M.S., R.B.D.), Boston University, Boston, Massachusetts 02118
Address all correspondence and requests for reprints to: James B. Meigs, M.D., M.P.H., General Medicine Division, Massachusetts General Hospital, 50 Staniford Street, 9th Floor, Boston, Massachusetts 02114. E-mail: jmeigs{at}partners.org.
Context: Metabolic risk conferred by adiposity may be due toassociated risk factor clustering.
Objective: The objective of this study was to assess risk fordiabetes or cardiovascular disease (CVD) stratified by bodymass index (BMI) and the presence or absence of metabolic syndrome(MetS) or insulin resistance (IR).
Design, Setting, and Participants: This was a community-based,longitudinal study of 2902 people (55% women, mean age 53 yr)without diabetes or CVD in 19891992 followed for up to11 yr. We categorized subjects by normal weight (BMI < 25kg/m2), overweight (2529.9 kg/m2), or obese (>30 kg/m2)and by the National Cholesterol Education Programs AdultTreatment Panel MetS or the top quartile of homeostasis modelIR. We used proportional hazard models to estimate risk relativeto normal weight and no MetS or IR.
Main Outcome Measure: Incident type 2 diabetes (treatment orfasting glucose 7 mmol/liter, 141 events) or CVD (myocardialinfarction, stroke, or claudication, 252 events) were measured.
Results: Among 1056 normal-weight subjects, 7% had MetS anda risk factor-adjusted relative risk for diabetes of 3.97 (95%confidence interval, 1.3511.6) and for CVD of 3.01 (1.685.41).Among 638 obese subjects, 37% did not have MetS or significantlyincreased risk. Obese subjects with MetS had an adjusted relativerisk for diabetes of 10.3 (5.4419.5) and for CVD of 2.13(1.433.18). Results were similar in analyses of BMI-IRcategories.
Conclusions: People with normal weight and MetS or IR or withobesity but no MetS or IR were not uncommon in our sample. Riskfactor clustering or IR appear to confer much of the risk fordiabetes or CVD commonly associated with elevated BMI.
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