Annual Deaths Attributable to Obesity in the United States

Allison, David B. PhD
Fontaine, Kevin R. PhD
Manson, JoAnn E. MD, DrPH
Stevens, June PhD
VanItallie, Theodore B. MD

Author Affiliations: Obesity Research Center, St Luke's/Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, NY (Drs Allison and VanItallie); Department of Medicine, Johns Hopkins University School of Medicine and The Johns Hopkins Bayview Medical Center, Baltimore, Md (Dr Fontaine); Brigham and Women's Hospital, Harvard Medical School, and Harvard School of Public Health, Boston, Mass (Dr Manson); and Departments of Nutrition and Epidemiology, University of North Carolina, Chapel Hill (Dr Stevens).

Corresponding Author and Reprints: David B. Allison, PhD, Obesity Research Center, St Luke's/Roosevelt Hospital, 1090 Amsterdam Ave, 14th Floor, New York, NY 10025 (e-mail: [email protected]).

JAMA: The Journal of the American Medical Association 282(16):p 1530-1538, October 27, 1999.

Context

Obesity is a major health problem in the United States, but the number of obesity-attributable deaths has not been rigorously estimated.

Objective

To estimate the number of deaths, annually, attributable to obesity among US adults.

Design

Data from 5 prospective cohort studies (the Alameda Community Health Study, the Framingham Heart Study, the Tecumseh Community Health Study, the American Cancer Society Cancer Prevention Study I, and the National Health and Nutrition Examination Survey I Epidemiologic Follow-up Study) and 1 published study (the Nurses' Health Study) in conjunction with 1991 national statistics on body mass index distributions, population size, and overall deaths.

Subjects

Adults, 18 years or older in 1991, classified by body mass index (kg/m²) as overweight (25-30), obese (30-35), and severely obese (>35).

Main Outcome Measure

Relative hazard ratio (HR) of death for obese or overweight persons.

Results

The estimated number of annual deaths attributable to obesity varied with the cohort used to calculate the HRs, but findings were consistent overall. More than 80% of the estimated obesity-attributable deaths occurred among individuals with a body mass index of more than 30 kg/m². When HRs were estimated for all eligible subjects from all 6 studies, the mean estimate of deaths attributable to obesity in the United States was 280,184 (range, 236,111-341,153). Hazard ratios also were calculated from data for nonsmokers or never-smokers only. When these HRs were applied to the entire population (assuming the HR applied to all individuals), the mean estimate for obesity-attributable death was 324,940 (range, 262,541-383,410).

Conclusions

The estimated number of annual deaths attributable to obesity among US adults is approximately 280,000 based on HRs from all subjects and 325,000 based on HRs from only nonsmokers and never-smokers.

JAMA.1999;282:1530-1538