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Updated: May 27, 2026
09:36
Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Obesity estimates for children based on parent-reported versus direct measures
Margot Shields1, Sarah Connor Gorber, Ian Janssen
1Health Analysis Division, Statistics Canada, Ottawa, Ontario, K1A 0T6. margot.shields@statcan.gc.ca
Health Reports
|November 24, 2011
Summary
Parental reports of children's height and weight lead to inaccurate obesity estimates and misclassification errors. Direct measurements are essential for reliable health indicator assessments in pediatric populations.
Area of Science:
- Pediatric health research
- Obesity epidemiology
- Biometric data analysis
Background:
- Self-reported height and weight for Body Mass Index (BMI) calculations in adults and adolescents underestimate obesity prevalence compared to measured data.
- Limited and inconsistent research exists on the bias introduced by parent-reported height and weight for children's obesity assessment.
Purpose of the Study:
- To examine the bias in parent-reported height and weight for children aged 6-11.
- To assess the impact of this bias on obesity prevalence estimates and associated health indicators.
- To evaluate the effectiveness of correction equations in mitigating misclassification errors.
Main Methods:
- Utilized data from the 2007-2009 Canadian Health Measures Survey.
- Collected parent-reported and directly measured height and weight for 854 children aged 6-11.
- Analyzed discrepancies and misclassification errors in Body Mass Index (BMI) categories.
Main Results:
- Parents significantly underestimated children's height (3.3 cm) and weight (1.1 kg) on average.
- Parent-reported data led to higher obesity prevalence estimates in younger children (6-8 years), but similar estimates in older children (9-11 years).
- Substantial misclassification errors in BMI categories were observed, weakening associations between obesity and health indicators like aerobic fitness and blood pressure.
Conclusions:
- Parental reporting bias for children's anthropometrics results in significant obesity misclassification, impacting health indicator relationships.
- Attempts to develop correction equations to adjust for this bias were largely unsuccessful.
- Accurate direct measurements of height and weight are crucial for reliable childhood obesity assessment and understanding its health implications.
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