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Comparison of self-reported and measured height and weight: Implications for obesity research among young adults

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  • Danubio, Maria Enrica
  • Miranda, Gaetano
  • Vinciguerra, Maria Giulia
  • Vecchi, Elvira
  • Rufo, Fabrizio

Abstract

Background The use of self-reported data in epidemiological surveys leads to misclassification of the prevalence of obesity as the participants overestimate or underestimate height, weight and/or both. Such misclassifications vary according to gender, age, status and ethnicity.Objectives To estimate on a sample of youth of both sexes (1) the difference between self-reported data and measured height and weight and (2) the extent of misclassification of BMI deriving from such differences.Methods Self-reporting in questionnaires and subsequent measurements of height and weight conducted by trained personnel. The mean values and the BMIs were calculated.Results Both sexes overestimate height (2.1 and 2.8Â cm for males and females, respectively), and underestimate weight (1.5 and 1.9Â kg for males and females, respectively). Consequently the BMI is underestimated (1.1 and 1.5 points for males and females, respectively). The classification of BMI from self-reported data shows underestimation of overweight in both sexes (8 percentage points) and of obese males (3.3 percentage points), an overestimation of normal weight (12.2 and 4.3 percentage points for males and females, respectively) and an excessive underweight in the girls (4.3 percentage points).Conclusions There is a difference between self-reported and measured data and self-reported biases are reflected in the classification of the participants in the 4 categories of BMI.

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  • Danubio, Maria Enrica & Miranda, Gaetano & Vinciguerra, Maria Giulia & Vecchi, Elvira & Rufo, Fabrizio, 2008. "Comparison of self-reported and measured height and weight: Implications for obesity research among young adults," Economics & Human Biology, Elsevier, vol. 6(1), pages 181-190, March.
    • Handle: RePEc:eee:ehbiol:v:6:y:2008:i:1:p:181-190
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    References listed on IDEAS

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    1. Ossiander, Eric M. & Emanuel, Irvin & O'Brien, William & Malone, Kathleen, 2004. "Driver's licenses as a source of data on height and weight," Economics & Human Biology, Elsevier, vol. 2(2), pages 219-227, June.
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