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Original Article
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Volume 347:305-313 August 1, 2002 Number 5
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Obesity and the Risk of Heart Failure
Satish Kenchaiah, M.D., Jane C. Evans, D.Sc., Daniel Levy, M.D., Peter W.F. Wilson, M.D., Emelia J. Benjamin, M.D., Martin G. Larson, S.D., William B. Kannel, M.D., M.P.H., and Ramachandran S. Vasan, M.D.

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ABSTRACT

Background Extreme obesity is recognized to be a risk factor for heart failure. It is unclear whether overweight and lesser degrees of obesity also pose a risk.

Methods We investigated the relation between the body-mass index (the weight in kilograms divided by the square of the height in meters) and the incidence of heart failure among 5881 participants in the Framingham Heart Study (mean age, 55 years; 54 percent women). With the use of Cox proportional-hazards models, the body-mass index was evaluated both as a continuous variable and as a categorical variable (normal, 18.5 to 24.9; overweight, 25.0 to 29.9; and obese, 30.0 or more).

Results During follow-up (mean, 14 years), heart failure developed in 496 subjects (258 women and 238 men). After adjustment for established risk factors, there was an increase in the risk of heart failure of 5 percent for men and 7 percent for women for each increment of 1 in body-mass index. As compared with subjects with a normal body-mass index, obese subjects had a doubling of the risk of heart failure. For women, the hazard ratio was 2.12 (95 percent confidence interval, 1.51 to 2.97); for men, the hazard ratio was 1.90 (95 percent confidence interval, 1.30 to 2.79). A graded increase in the risk of heart failure was observed across categories of body-mass index. The hazard ratios per increase in category were 1.46 in women (95 percent confidence interval, 1.23 to 1.72) and 1.37 in men (95 percent confidence interval, 1.13 to 1.67).

Conclusions In our large, community-based sample, increased body-mass index was associated with an increased risk of heart failure. Given the high prevalence of obesity in the United States, strategies to promote optimal body weight may reduce the population burden of heart failure.


Source Information

From the Framingham Heart Study, Framingham, Mass. (S.K., J.C.E., D.L., P.W.F.W., E.J.B., M.G.L., W.B.K., R.S.V.); the Section of Preventive Medicine (D.L., E.J.B., M.G.L., W.B.K., R.S.V.) and the Cardiology Section (E.J.B., R.S.V.), Boston University School of Medicine, Boston; the Cardiology Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston (D.L.); and the National Heart, Lung, and Blood Institute, Bethesda, Md. (D.L.).

Address reprint requests to Dr. Vasan at the Framingham Heart Study, 73 Mt. Wayte Ave., Suite 2, Framingham, MA 01702, or at vasan{at}fram.nhlbi.nih.gov.

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Related Letters:

Obesity and the Risk of Heart Failure
O'Brien G., Maurer M. S., Taegtmeyer H., Wilson C. R., Dart R. A., Jenny-Avital E. R., Kenchaiah S., Levy D., Vasan R. S., Massie B. M.
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N Engl J Med 2002; 347:1887-1889, Dec 5, 2002. Correspondence

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