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Educational disparity in obesity among U.S. adults, 1984-2013
1Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois at Urbana-Champaign, Champaign.
Purpose:
Examine the annual trends in educational disparity in obesity among U.S. adults aged 18 years and more from 1984 to 2013.
Methods:
Secondary data analysis of 6,147,379 participants in a repeated cross-sectional nationally representative health survey of U.S. adults.
Results:
The obesity prevalence among people with primary school or lower education increased from 17.46% or 3.41 times the prevalence among college graduates (5.12%) in 1984 to 36.16% or 1.73 times the prevalence among college graduates (20.94%) in 2013. In any given year, the obesity prevalence increased monotonically with lower education level. The obesity prevalence across education subgroups without a college degree gradually converged since early 2000s, whereas that between those subgroups and college graduates diverged since late 1980s. Absolute educational disparity in obesity widened by 60.84% to 61.14% during 1984-2013 based on the absolute concentration index and the slope index of inequality, respectively; meanwhile, relative educational disparity narrowed by 52.06% to 52.15% based on the relative index of inequality and the relative concentration index, respectively. The trends in educational disparity in obesity differed substantially by gender, race/ethnicity, age group, and obesity severity.
Conclusions:
There was substantial educational disparity in obesity among U.S. adults and the trend differed across population subgroups.
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