Evaluation of bias in estimates of early childhood obesity from parent-reported heights and weights

M.S. Rendall, M.M. Weden, C. Lau, P. Brownell, Z. Nazarov and M. Fernandes

American Journal of Public Health, 2014, vol. 104, issue 7, 1255-1262

Abstract: Objectives. We evaluated bias in estimated obesity prevalence owing to error in parental reporting. We also evaluated bias mitigation through application of Centers for Disease Control and Prevention's biologically implausible value (BIV) cutoffs. Methods. We simulated obesity prevalence of children aged 2 to 5 years in 2 panel surveys after counterfactually substituting parameters estimated from 1999-2008 National Health and Nutrition Examination Survey data for prevalence of extreme height and weight and for proportions obese in extreme height or weight categories. Results. Heights reported below the first and fifth height-for-age percentiles explained between one half and two thirds, respectively, of total bias in obesity prevalence. Bias was reduced by one tenth when excluding cases with heightfor-age and weight-for-age BIVs and by one fifth when excluding cases with body mass-index-for-age BIVs. Applying BIVs, however, resulted in incorrect exclusion of nonnegligible proportions of obese children. Conclusions. Correcting the reporting of children's heights in the first percentile alonemay reduce overestimation of early childhood obesity prevalence in surveys with parental reporting by one half to two thirds. Excluding BIVs has limited effectiveness inmitigating this bias.

Keywords: article; body height; body mass; body weight; childhood obesity; female; health survey; human; information processing; male; parent; preschool child; prevalence; self report; statistical bias, Bias (Epidemiology); Body Height; Body Mass Index; Body Weight; Child, Preschool; Data Collection; Female; Health Surveys; Humans; Male; Parents; Pediatric Obesity; Prevalence; Self Report (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:aph:ajpbhl:10.2105/ajph.2014.302001_1

DOI: 10.2105/AJPH.2014.302001

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