Obesity is considered a global pandemic1

The global prevalence of obesity has increased significantly over the last 30 years.1

In 2012, more than one-third of adults in the United States were obese.2 

35%

Definition of obesity

Obesity is defined by the World Health Organization (WHO) as abnormal or excessive fat accumulation that may impair health.3

BMI (body mass index) provides a convenient population-level measure of obesity.3

 

Classification based on BMI3

BMI=the weight in kilograms divided by the square of the height in meters (kg/m2).3
 

Classification table

   

Also in The Science of Obesity:

   

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References:

  1. Ng M, Fleming T, Robinson M, et al. Global, regional, and national prevalence of overweight and obesity in children and adults during 1980-2013: a systematic analysis for the Global Burden of Disease Study 2013. Lancet. 2014;384(9945):766-781.
  2. Ogden CL, Carroll MD, Kit BK, Flegal KM. Prevalence of childhood and adult obesity in the United States, 2011-2012. JAMA. 2014;311(8):806-814.
  3. World Health Organization. Obesity: preventing and managing the global epidemic. Report of a WHO consultation. World Health Organ Tech Rep Ser. 2000;894:1-253.