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The Trend of BMI Values among US Adults

Author

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  • John Komlos
  • Marek Brabec

Abstract

Background: The trend in the BMI values of the US population has not been estimated accurately because time series data are unavailable and because the focus has been on calculating period effects. Object: To estimate the trend and rate of change of BMI values by birth cohorts stratified by gender and ethnicity born 1882-1986. Methods: We use loess additive regression models to estimate age and trend effects of BMI values of US-born black and white adults measured between 1959 and 2006. We use all the NHES and NHANES survey data. Results: The increase in BMI was already underway among the birth cohorts of the early 20th century. The rate of increase was fastest among black females; for the three other groups under consideration, the rates of increase were similar. The generally persistent upward trend was punctuated by upsurges, particularly after each of the two World Wars. That the estimated rate of change of BMI values increased by 71% among black females between the birth cohorts 1955 and those of 1965 is indicative of the rapid increases in their weight. Conclusion: We inference that transition to post-industrial weights was a gradual process and began considerably earlier than hitherto supposed.

Suggested Citation

  • John Komlos & Marek Brabec, 2010. "The Trend of BMI Values among US Adults," CESifo Working Paper Series 2987, CESifo Group Munich.
  • Handle: RePEc:ces:ceswps:_2987
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    References listed on IDEAS

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    More about this item

    Keywords

    BMI; US; NHANES; obesity; overweight; semiparametric modeling;

    JEL classification:

    • I10 - Health, Education, and Welfare - - Health - - - General
    • N00 - Economic History - - General - - - General

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