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Epidemiology of Obesity

First submitted by:
Shawn Tsuda
Category
Bariatric Surgery
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The prevalence of obesity in the United States continues to rise and is one of six national priorities for disease prevention as determined by the United States Surgeon General.

The Center for Disease Control defines overweight as a body mass index (BMI, kg/m2) of 25.0 to 29.9 and obesity as a BMI greater than 30 kg/m2. Severe obesity is a BMI greater than 40.

More than 65% of Americans are either overweight or obese. The economic impact of obesity is related to health problems that may be linked to increased BMI, including diabetes mellitus, joint problems, hypertension, obstructive sleep apnea, and coronary artery disease. The financial impact of direct and indirect costs can be staggering. The overall economic impact is estimated by the Department of Health and Human Services to be $ 117 billion in 2000.

The number of people who are considered obese or overweight, or have a BMI of equal to or greater than 30 kg/m2, has doubled in the last two decades. NHANES data for 2003 to 2004 reported a 32.2% prevalence of adults who were obese (BMI > 30 kg/m2), an increase from 15.0% in NHANES II (1976-1980. While there has been an increase in the population who are either overweight or obese over the last two decades (from 56% to 66%), most of the increase is in the obese category.

 

The continued growth of the obesity epidemic has been followed by an increase in the number of people who are candidates for weight-loss surgery. Between 1998 and 2004, weight loss operations rose by 800% from 13,386 to 121,055.
There is a trend of worsening obesity among children and adolescents. Overweight in children and adolescents (from 2 to 19 years old) is defined as at or above the 95th percentile of the sex-specific body mass index (BMI) for age growth charts established by the CDC. Since the 1970’s, the prevalence in children and adolescents has nearly tripled.

 

Map_county_obese_diabetes_2

 

 Picture3

From the Center for Disease Control.

References

  1. Flegal KM, Carroll MD, Ogden CL, Johnson CL. Prevalence and trends in obesity among US adults, 1999-2000 2002; JAMA 288:1723-7.
  2. Gastrointestinal surgery for severe obesity. Proceedings of a National Institutes of Health Consensus Development Conference. March 25-27, 1991, Bethesda, MD.  Am J Clin Nutr. 1992 Feb;55(2 Suppl):487S-619S.
  3. Ogden CL, Carroll MD, Curtin LR, et al. Prevalence of overweight and obesity in the United States, 1999-2004 2006; JAMA 295:1549-1555.
  4. Wolf AM, Colditz GA. Current estimates of the economic cost of obesity in the United States. Obes Res;1998;6(2):97–106.
  5. World Health Organization. Fact Sheet on Overweight and Obesity. Sept 2006.
1,727

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