一项路径分析，旨在确定影响中学女生身体活动和骨骼健康的社会心理因素。
A path analysis to identify the psychosocial factors influencing physical activity and bone health in middle-school girls.
作者信息
Sharma Shreela V, Hoelscher Deanna M, Kelder Steven H, Diamond Pamela M, Day R Sue, Hergenroeder Albert C
机构信息
Epidemiology Dept, University of Texas Health Science Center at Houston, TX, USA.
出版信息
J Phys Act Health. 2009 Sep;6(5):606-16. doi: 10.1123/jpah.6.5.606.
BACKGROUND
The purpose of this study was to identify pathways used by psychosocial factors to influence physical activity and bone health in middle-school girls.
METHODS
Baseline data from the Incorporating More Physical Activity and Calcium in Teens (IMPACT) study collected in 2001 to 2003 were used. IMPACT was a 1 1/2 years nutrition and physical activity intervention study designed to improve bone density in 717 middle-school girls in Texas. Structural Equations Modeling was used to examine the interrelationships and identify the direct and indirect pathways used by various psychosocial and environmental factors to influence physical activity and bone health.
RESULTS
Results show that physical activity self-efficacy and social support (friend, family engagement, and encouragement in physical activity) had a significant direct and indirect influence on physical activity with participation in sports teams as the mediator. Participation in sports teams had a direct effect on both physical activity (beta = 0.20, P < .05) and bone health and (beta = 0.13, P < .05).
CONCLUSION
The current study identified several direct and indirect pathways that psychosocial factors use to influence physical activity and bone health among adolescent girls. These findings are critical for the development of effective interventions for promoting bone health in this population.
背景
本研究旨在确定心理社会因素影响中学女生身体活动和骨骼健康的途径。
方法
使用2001年至2003年收集的“青少年增加身体活动和钙摄入”（IMPACT）研究的基线数据。IMPACT是一项为期1.5年的营养和身体活动干预研究，旨在提高德克萨斯州717名中学女生的骨密度。采用结构方程模型来检验各种心理社会和环境因素影响身体活动和骨骼健康的相互关系，并确定直接和间接途径。
结果
结果表明，身体活动自我效能感和社会支持（朋友、家人参与及对身体活动的鼓励）对身体活动有显著的直接和间接影响，以参加运动队为中介。参加运动队对身体活动（β = 0.20，P <.05）和骨骼健康（β = 0.13，P <.05）均有直接影响。
结论
本研究确定了心理社会因素影响青少年女生身体活动和骨骼健康的几种直接和间接途径。这些发现对于制定促进该人群骨骼健康的有效干预措施至关重要。
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