Changes in the distribution of body mass index of adults and children in the US population (original) (raw)

International Journal of Obesity volume 24, pages 807–818 (2000) Cite this article

Abstract

BACKGROUND: National survey data show increases in mean body mass index (BMI) and in the prevalence of overweight and obesity for adults and children in the United States, indicating a change in the distribution of BMI.

OBJECTIVE: To apply graphical methods to describe changes in the distribution of BMI.

DESIGN: BMI values from the third National Health and Nutrition Examination Survey (NHANES III: 1988–94) were compared with data from earlier cross-sectional nationally representative surveys for adults 20–74 y of age and for children and adolescents 6–17 y of age. Tukey mean–difference plots were used to investigate the changes in the distributions of BMI within sex–age groups.

RESULTS: Mean–difference plots allow qualitative visual comparisons of the distributions of BMI between surveys. For all sex–age groups, there was increasing skewness with a greater shift in the upper part of the distribution so that, within each group, the heaviest subgroup was heavier in NHANES III than in prior surveys. For the youngest children, the lower part of the distribution showed virtually no change. With increasing age the whole distribution tended to shift upward slightly, suggesting an increase in BMI across the entire population.

CONCLUSIONS: These changes in the distribution of BMI suggest the combination of both profound environmental determinants and a population with a high degree of susceptibility. The reasons for the increasing prevalence of obesity should be sought in part by seeking to understand the factors causing increases in the population as a whole.

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Authors and Affiliations

  1. National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, MD, USA
    KM Flegal & RP Troiano
  2. National Cancer Institute, NIH, Bethesda, MD, USA
    RP Troiano

Authors

  1. KM Flegal
  2. RP Troiano

Corresponding author

Correspondence toKM Flegal.

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Flegal, K., Troiano, R. Changes in the distribution of body mass index of adults and children in the US population.Int J Obes 24, 807–818 (2000). https://doi.org/10.1038/sj.ijo.0801232

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