Department of Community Health and Epidemiology, Queen's University, 99 University Avenue, Kingston, ON K7L 3N6, Canada.
Int J Environ Res Public Health. 2011 Aug;8(8):3333-50. doi: 10.3390/ijerph8083333. Epub 2011 Aug 16.
Street connectivity, defined as how well streets connect to one and other and the density of intersections, is positively associated with active transportation in adults. Our objective was to study the relation between street connectivity and physical activity in youth. Study participants consisted of 8,535 students in grades 6-10 from 180 schools across Canada who completed the 2006 Health Behaviour in School-aged Children (HBSC) survey. Street connectivity was measured in a 5 km circular buffer around these schools using established geographic information system measures. Physical activity performed outside of school hours was assessed by questionnaire, and multi-level regression analyses were used to estimate associations with street connectivity after controlling for several covariates. Compared to students living in the highest street connectivity quartile, those in the second (relative risk = 1.22, 95% confidence interval = 1.10-1.35), third (1.25, 1.13-1.37), and fourth (1.21, 1.09-1.34) quartiles were more likely to be physically active outside of school. In conclusion, youth in neighbourhoods with the most highly connected streets reported less physical activity outside of school than youth from neighbourhoods with less connected streets. Relationships between street connectivity and physical activity reported in this national study are in the opposite direction to those previously observed for active transportation in adult populations.
街道连通性（指街道之间的连接程度和交叉口的密度）与成年人的积极交通方式呈正相关。我们的目的是研究街道连通性与青少年身体活动之间的关系。研究参与者包括来自加拿大 180 所学校的 8535 名 6-10 年级的学生，他们完成了 2006 年的“青少年健康行为”（HBSC）调查。使用既定的地理信息系统措施，在这些学校周围 5 公里的圆形缓冲区中测量街道连通性。通过问卷调查评估校外的身体活动，采用多水平回归分析，在校正多个协变量后，估计与街道连通性的关联。与生活在街道连通性最高四分位的学生相比，生活在第二（相对风险=1.22，95%置信区间=1.10-1.35）、第三（1.25，1.13-1.37）和第四（1.21，1.09-1.34）四分位的学生更有可能在课外进行身体活动。总之，社区街道连通性最高的青少年在校外的身体活动比社区街道连通性较低的青少年少。这项全国性研究报告的街道连通性与身体活动之间的关系与先前观察到的成年人积极交通方式的关系相反。
