LeBlanc A G, Katzmarzyk P T, Barreira T V, Broyles S T, Chaput J-P, Church T S, Fogelholm M, Harrington D M, 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
Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; University of Ottawa, Ottawa, Ontario, Canada.
Pennington Biomedical Research Center , Baton Rouge, LA, USA.
Int J Obes Suppl. 2015 Dec;5(Suppl 2):S9-S16. doi: 10.1038/ijosup.2015.13. Epub 2015 Dec 8.
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).
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).
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.
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.
国际儿童肥胖、生活方式与环境研究（ISCOLE）提供了关于全球9至11岁儿童身体活动、饮食和体重状况的有力的多国信息。本分析的目的是研究ISCOLE各站点参与者特征与ISCOLE国家（澳大利亚、巴西、加拿大、中国、哥伦比亚、芬兰、肯尼亚、印度、葡萄牙、南非、英国和美国）具有全国代表性的调查数据之间的异同。
在每个ISCOLE国家层面的数据库中评估特征分布，并与可获得的国家或地区调查的已发表数据进行比较。预先确定比较变量，包括体重指数（BMI）、身体活动（通过加速度计确定的每日步数）和屏幕时间（儿童报告）。
在12个国家中，8个国家有体重状况（BMI）数据，5个国家有测量的身体活动（每日步数）数据，9个国家有自我报告的屏幕时间数据。作为学龄儿童健康行为调查一部分的5个ISCOLE国家（即加拿大、芬兰、葡萄牙、英国（英格兰）和美国）也提供了关于自我报告身体活动的可比数据。现有的特定国家数据通常使用不同的测量工具或切点，难以进行直接比较。在可能的情况下，对ISCOLE数据进行重新分析以匹配国家层面的数据，但这一步骤限制了国家间的比较。
从所进行的分析来看，ISCOLE数据似乎没有系统性偏差；然而，由于数据可用性的限制，在规划国家层面的人口健康干预措施时，应谨慎使用ISCOLE的数据。这项工作凸显了在考虑文化特定特征的同时，全球需要统一测量工具，以及研究中心和研究团队之间开展合作的必要性。
