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Title: Are participant characteristics from ISCOLE study sites comparable to the rest of their country?
Authors: LeBlanc, A. G.
Katzmarzyk, P. T.
Broyles, S. T.
Chaput, J.-P.
Church, T. S.
Fogelholm, M.
Harrington, Deirdre
Hu, G.
Kuriyan, R.
Kurpad, A.
Lambert, E. V.
Maher, C.
Maia, J.
Matsudo, V.
Olds, T.
Onywera, V.
Sarmiento, O. L.
Standage, M.
Tudor-Locke, C.
Zhao, P.
Tremblay, M. S.
First Published: 8-Dec-2015
Publisher: Nature Publishing Group
Citation: International Journal of Obesity Supplements 5, S9-S16 (December 2015)
Abstract: OBJECTIVES: The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) provides robust, multi-national information on physical activity, diet and weight status in 9–11-year-old children around the world. The purpose of this analysis was to examine the similarities and differences between participant characteristics from ISCOLE sites and data from nationally representative surveys from ISCOLE countries (Australia, Brazil, Canada, China, Colombia, Finland, Kenya, India, Portugal, South Africa, the United Kingdom and the United States). METHODS: Distributions of characteristics were assessed within each ISCOLE country-level database, and compared with published data from national or regional surveys, where available. Variables of comparison were identified a priori and included body mass index (BMI), physical activity (accelerometer-determined steps per day) and screen time (child-report). RESULTS: Of 12 countries, data on weight status (BMI) were available in 8 countries, data on measured physical activity (steps per day) were available in 5 countries and data on self-reported screen time were available in 9 countries. The five ISCOLE countries that were part of the Health Behaviour in School-aged Children Survey (that is, Canada, Finland, Portugal, the United Kingdom (England) and the United States) also provided comparable data on self-reported physical activity. Available country-specific data often used different measurement tools or cut-points, making direct comparisons difficult. Where possible, ISCOLE data were re-analyzed to match country-level data, but this step limited between-country comparisons. CONCLUSIONS: From the analyses performed, the ISCOLE data do not seem to be systematically biased; however, owing to limitations in data availability, data from ISCOLE should be used with appropriate caution when planning country-level population health interventions. This work highlights the need for harmonized measurement tools around the world while accounting for culturally specific characteristics, and the need for collaboration across study centers and research groups.
DOI Link: 10.1038/ijosup.2015.13
ISSN: 0307-0565
eISSN: 1476-5497
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2015, Nature Publishing Group. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Health Sciences

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