Validation and application of a novel method of measuring non-response bias in school-based surveys of paediatric overweight and obesity

Booth, ML; Okely, AD; Denney-Wilson, E

Validation and application of a novel method of measuring non-response bias in school-based surveys of paediatric overweight and obesity

Booth, ML Okely, AD Denney-Wilson, E

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Publication Type:: Journal Article
Citation:: International Journal of Pediatric Obesity, 2011, 6 (2 -2)
Issue Date:: 2011-06-01

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Field	Value	Language
dc.contributor.author	Booth, ML	en_US
dc.contributor.author	Okely, AD	en_US
dc.contributor.author	Denney-Wilson, E https://orcid.org/0000-0001-9879-4969	en_US
dc.date.issued	2011-06-01	en_US
dc.identifier.citation	International Journal of Pediatric Obesity, 2011, 6 (2 -2)	en_US
dc.identifier.issn	1747-7166	en_US
dc.identifier.uri	http://hdl.handle.net/10453/122491
dc.description.abstract	Objective. To validate a method of estimating non-response bias to a school-based survey based on body mass index (BMI). Methods. A population survey of Australian students in Kindergarten and Grades 2, 4, 6, 8 and 10 (N=5 407) was conducted in 2004, and height and weight measured. Teachers matched the height and weight of all students who were selected to participate, but who were not measured (non-participating students) and of half of the students whose height and weight had been measured based on comparisons with the remaining half of measured students. Among those students whose height and weight had been both measured and estimated based on matching with the most similar student, percent agreement between the BMI categories based on measured and estimated values was calculated to determine the validity of the estimated BMI value. The prevalence of overweight and obesity among participating and non-participating students was compared to determine the magnitude of non-response bias. Results. For more than 88% of classes, percent agreement between BMI categories based on estimated and measured height and weight was >60%. The differences in the prevalence of overweight and obesity between participating and non-participating students were all less than one percentage point. Conclusions. Most teachers were able to validly match students based on their height and weight, allowing estimation of and adjustment for non-response bias among non-participating students. © 2011 Informa Healthcare.	en_US
dc.relation.ispartof	International Journal of Pediatric Obesity	en_US
dc.relation.isbasedon	10.3109/17477166.2010.498917	en_US
dc.subject.classification	Endocrinology & Metabolism	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Obesity	en_US
dc.subject.mesh	Body Weight	en_US
dc.subject.mesh	Body Mass Index	en_US
dc.subject.mesh	Body Height	en_US
dc.subject.mesh	Health Surveys	en_US
dc.subject.mesh	Prevalence	en_US
dc.subject.mesh	Epidemiologic Research Design	en_US
dc.subject.mesh	Reproducibility of Results	en_US
dc.subject.mesh	Bias (Epidemiology)	en_US
dc.subject.mesh	Schools	en_US
dc.subject.mesh	Adolescent	en_US
dc.subject.mesh	Child	en_US
dc.subject.mesh	Child, Preschool	en_US
dc.subject.mesh	New South Wales	en_US
dc.subject.mesh	Female	en_US
dc.subject.mesh	Male	en_US
dc.subject.mesh	Overweight	en_US
dc.subject.mesh	Bias	en_US
dc.title	Validation and application of a novel method of measuring non-response bias in school-based surveys of paediatric overweight and obesity	en_US
dc.type	Journal Article
utslib.citation.volume	2 -2	en_US
utslib.citation.volume	6	en_US
utslib.for	1111 Nutrition and Dietetics	en_US
utslib.for	11 Medical and Health Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
utslib.copyright.status	closed_access
pubs.issue	2 -2	en_US
pubs.publication-status	Published	en_US
pubs.volume	6	en_US

Abstract:

Objective. To validate a method of estimating non-response bias to a school-based survey based on body mass index (BMI). Methods. A population survey of Australian students in Kindergarten and Grades 2, 4, 6, 8 and 10 (N=5 407) was conducted in 2004, and height and weight measured. Teachers matched the height and weight of all students who were selected to participate, but who were not measured (non-participating students) and of half of the students whose height and weight had been measured based on comparisons with the remaining half of measured students. Among those students whose height and weight had been both measured and estimated based on matching with the most similar student, percent agreement between the BMI categories based on measured and estimated values was calculated to determine the validity of the estimated BMI value. The prevalence of overweight and obesity among participating and non-participating students was compared to determine the magnitude of non-response bias. Results. For more than 88% of classes, percent agreement between BMI categories based on estimated and measured height and weight was >60%. The differences in the prevalence of overweight and obesity between participating and non-participating students were all less than one percentage point. Conclusions. Most teachers were able to validly match students based on their height and weight, allowing estimation of and adjustment for non-response bias among non-participating students. © 2011 Informa Healthcare.

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http://hdl.handle.net/10453/122491