Adult Obesity Facts

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Adult Obesity Facts







Obesity is a common, serious, and costly disease.


  • The prevalence of obesity was 42.4% in 2017~2018. 
  • From 1999–2000 through 2017–2018, the prevalence of obesity increased from 30.5% to 42.4%, and the prevalence of severe obesity increased from 4.7% to 9.2%. 
  • Obesity-related conditions include heart disease, stroke, type 2 diabetes, and certain types of cancer that are leading causes of preventable, premature death. 
  • The estimated annual medical cost of obesity in the United States was $147 billion in 2008 US dollars; the medical cost for people who have obesity was $1,429 higher than those of normal weight. 

Obesity affects some groups more than others.


  • Non-Hispanic blacks (49.6%) had the highest age-adjusted prevalence of obesity, followed by Hispanics (44.8%), non-Hispanic whites (42.2%), and non-Hispanic Asians (17.4%).
  • The prevalence of obesity was 40.0% among young adults aged 20 to 39 years, 44.8% among middle-aged adults aged 40 to 59 years, and 42.8% among adults aged 60 and older.

Obesity and socioeconomic status


The association between obesity and income or educational level is complex and differs by sex and race/ethnicity.

  • Overall, men and women with college degrees had lower obesity prevalence compared with those with less education.
  • By race/ethnicity, the same obesity and education pattern was seen among non-Hispanic white, non-Hispanic black, and Hispanic women, and also among non-Hispanic white men, although the differences were not all statistically significant. Although the difference was not statistically significant among non-Hispanic black men, obesity prevalence increased with educational attainment. Among non-Hispanic Asian women and men and Hispanic men, there were no differences in obesity prevalence by education level.
  • Among men, obesity prevalence was lower in the lowest and highest income groups than the middle-income group. This pattern was seen among non-Hispanic white and Hispanic men. Obesity prevalence was higher in the highest income group than in the lowest income group among non-Hispanic black men.
  • Among women, obesity prevalence was lower in the highest income group than in the middle and lowest income groups. This pattern was observed among non-Hispanic white, non-Hispanic Asian, and Hispanic women. Among non-Hispanic black women, there was no difference in obesity prevalence by income.
  • Genetics and lifestyle play a part in obesity.


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