Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
Department of Paediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
Int J Environ Res Public Health. 2019 Aug 3;16(15):2782. doi: 10.3390/ijerph16152782.
This study investigated the relationships between children's friendship ties and their physical activity (PA) both before and after their transition to a new school year. In 2011-2012, children in grades 5-8 attending a Canadian urban middle-school completed web-based health and friendship surveys two times before ("pre-transition") and three times after ("post-transition") they moved up in school grade. Cross-sectional associations between an average daily frequency of ≥60 min/day of moderate-to-vigorous intensity PA (MVPA) and characteristics of children's friendships were estimated for pre-transition ( = 191) and post-transition ( = 255) data. Sociodemographic-adjusted linear regression (β) estimated associations between a child's MVPA and friendship characteristics. We found positive associations between a child's MVPA and the average MVPA of their friends at post-transition only (β = 0.61, 95% CI 0.10 to 1.13) and the number of sent friendships at pre-transition (β = 0.03, 95% CI 0.01 to 0.05) and post-transition (β = 0.02, 95% CI 0.01 to 0.04). A statistically significant interaction between popularity and friends' average PA at pre-transition was also found. The PA of friends and the number of school friends that a child identified are positively associated with MVPA. The estimated associations between MVPA and aspects of children's friendships are similar for boys and girls.
本研究调查了儿童友谊关系与其在进入新学年前后的身体活动（PA）之间的关系。2011-2012 年，加拿大一所城市中学的 5-8 年级儿童在升年级前（“过渡前”）和升年级后（“过渡后”）各进行了两次基于网络的健康和友谊调查。在过渡前（n=191）和过渡后（n=255）的数据中，分别估计了儿童平均每天有≥60 分钟中度至剧烈强度 PA（MVPA）的频率与儿童友谊特征之间的横断面关联。对儿童 MVPA 和友谊特征之间的关联进行了社会人口统计学调整的线性回归（β）。我们发现，仅在过渡后，儿童的 MVPA 与朋友的平均 MVPA 呈正相关（β=0.61，95%CI 0.10 至 1.13），且在过渡前（β=0.03，95%CI 0.01 至 0.05）和过渡后（β=0.02，95%CI 0.01 至 0.04）与发送友谊的数量呈正相关。还发现了过渡前受欢迎程度与朋友平均 PA 之间的统计学显著交互作用。朋友的 PA 和孩子确定的学校朋友数量与 MVPA 呈正相关。男孩和女孩之间 MVPA 与儿童友谊方面的关联估计相似。
