Nadeau Charles, Letarte Laurence, Fratu Ramona, Waygood E Owen D, Lebel Alexandre
Quebec Heart and Lung Institute, Evaluation Platform on Obesity Prevention (Nadeau, Letarte, Fratu, Lebel); École supérieur d'aménagement du territoire et de développement régional (Nadeau, Letarte, Fratu, Waygood, Lebel), Laval University, Québec, Que.
CMAJ Open. 2016 Aug 19;4(3):E436-E443. doi: 10.9778/cmajo.20150089. eCollection 2016 Jul-Sep.
The aim of this study was to explore the population-wide distribution in the practice of leisure-time physical activity among Canadian youth and how physical activity level is influenced by contextual features of the environment.
We studied the self-reported leisure-time physical activity of 54 832 Canadians aged 12 to 17 years. Observations were structured according to a 4-level geographic hierarchy. The outcome studied was a dichotomous indicator that referred to achieving (or not) the recommended daily level of leisure-time physical activity. To investigate the influence of the contextual features, we conducted multilevel logistic regressions.
For both girls and boys, significant variations were observed between health regions and between neighbourhoods within the provinces. Girls who lived in an urban setting showed lower odds of achieving the recommended physical activity level, as did those surveyed during the winter. Boys surveyed during the winter also showed lower odds of achieving the recommended level, but living in an urban setting had no effect on activity levels. Analysis of province-level residuals showed that girls living in Quebec were less likely to achieve the recommended activity level as compared with the national mean, and girls living in Ontario and British Columbia were more likely to achieve that threshold. Boys living in Ontario were more likely to achieve the recommended activity level as compared with the national mean. Youth had up to a 17% increased chance of achieving the recommended physical activity level if they lived in a context with a higher activity achievement level.
Leisure-time physical activity was associated with environmental factors at multiple geographic scales among Canadian youth. The variation was more important at the neighbourhood level. The results provide rationale for further investigation into how leisure-time physical activity is promoted in different contexts.
本研究旨在探讨加拿大青少年休闲体育活动的总体分布情况，以及环境的背景特征如何影响体育活动水平。
我们研究了54832名12至17岁加拿大青少年自我报告的休闲体育活动情况。观察结果按照四级地理层次结构进行整理。所研究的结果是一个二分指标，指达到（或未达到）建议的每日休闲体育活动水平。为了调查背景特征的影响，我们进行了多水平逻辑回归分析。
在女孩和男孩中，均观察到健康区域之间以及省内社区之间存在显著差异。居住在城市环境中的女孩达到建议体育活动水平的几率较低，冬季接受调查的女孩也是如此。冬季接受调查的男孩达到建议水平的几率也较低，但居住在城市环境对活动水平没有影响。省级残差分析表明，与全国平均水平相比，居住在魁北克的女孩达到建议活动水平的可能性较小，而居住在安大略省和不列颠哥伦比亚省的女孩更有可能达到该阈值。与全国平均水平相比，居住在安大略省的男孩更有可能达到建议的活动水平。如果青少年生活在活动成就水平较高的环境中，他们达到建议体育活动水平的几率会增加17%。
加拿大青少年的休闲体育活动在多个地理尺度上与环境因素相关。这种差异在社区层面更为重要。研究结果为进一步调查如何在不同环境中促进休闲体育活动提供了理论依据。
