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Abstract：
Slowing the decline in participation in physical activity among adolescent girls is a public health priority. This study reports the outcomes from a multi-component school-based intervention (Girls in Sport), focused on promoting physical activity among adolescent girls.
Group randomized controlled trial in 24 secondary schools (12 intervention and 12 control). Assessments were conducted at baseline (2009) and at 18 months post-baseline (2010). The setting was secondary schools in urban, regional and rural areas of New South Wales, Australia. All girls in Grade 8 in 2009 who attended these schools were invited to participate in the study (N = 1769). Using a Health Promoting Schools and Action Learning Frameworks, each school formed a committee and developed an action plan for promoting physical activity among Grade 8 girls. The action plan incorporated strategies in three main areas - i) the formal curriculum, ii) school environment, and iii) home/school/community links - based on the results of formative data from target girls and staff and on individual needs of the school. A member of the research team supported each school throughout the intervention. The main outcome measure was accelerometer-derived total physical activity (TPA) spent in physical activity. Data were analyzed from December 2011 to March 2012.
1518 girls (mean age 13.6y ±0.02) were assessed at baseline. There was a significant decline in TPA from baseline to 18-month follow-up with no differences between girls in the intervention and control schools. Only one-third of schools (4/12) implemented the intervention as per their action plan. Per-protocol analyses on these schools revealed a smaller decline in percentage of time spent in MVPA among girls in the intervention group (adjusted difference 0.5%, 95% CI = -0.01, 0.99, P = 0.05).
The Girls in Sport intervention was not effective in reducing the decline in physical activity among adolescent girls. Lack of implementation by most intervention schools was the main reason for a null effect. Identifying strategies to enhance implementation levels is critical to determining the true potential of this intervention approach.
This study was retrospectively registered with the Australian New Zealand Clinical Trials Registry ACTRN12610001077055 . Date of registration: 7 December 2010.
Group randomized controlled trial in 24 secondary schools (12 intervention and 12 control). Assessments were conducted at baseline (2009) and at 18 months post-baseline (2010). The setting was secondary schools in urban, regional and rural areas of New South Wales, Australia. All girls in Grade 8 in 2009 who attended these schools were invited to participate in the study (N = 1769). Using a Health Promoting Schools and Action Learning Frameworks, each school formed a committee and developed an action plan for promoting physical activity among Grade 8 girls. The action plan incorporated strategies in three main areas - i) the formal curriculum, ii) school environment, and iii) home/school/community links - based on the results of formative data from target girls and staff and on individual needs of the school. A member of the research team supported each school throughout the intervention. The main outcome measure was accelerometer-derived total physical activity (TPA) spent in physical activity. Data were analyzed from December 2011 to March 2012.
1518 girls (mean age 13.6y ±0.02) were assessed at baseline. There was a significant decline in TPA from baseline to 18-month follow-up with no differences between girls in the intervention and control schools. Only one-third of schools (4/12) implemented the intervention as per their action plan. Per-protocol analyses on these schools revealed a smaller decline in percentage of time spent in MVPA among girls in the intervention group (adjusted difference 0.5%, 95% CI = -0.01, 0.99, P = 0.05).
The Girls in Sport intervention was not effective in reducing the decline in physical activity among adolescent girls. Lack of implementation by most intervention schools was the main reason for a null effect. Identifying strategies to enhance implementation levels is critical to determining the true potential of this intervention approach.
This study was retrospectively registered with the Australian New Zealand Clinical Trials Registry ACTRN12610001077055 . Date of registration: 7 December 2010.
摘要：
减缓少女参与体育活动的下降是公共卫生的优先事项。这项研究报告了多部分学校干预的结果（运动中的女孩），专注于促进青春期女孩的体育锻炼。
24所中学（12个干预和12个对照）的小组随机对照试验。在基线（2009年）和基线后18个月（2010年）进行评估。设置是城市的中学，新南威尔士州的地区和农村地区，澳大利亚。所有在这些学校就读的2009年8年级的女孩都被邀请参加这项研究(N=1769)。使用健康促进学校和行动学习框架，每个学校都成立了一个委员会，并制定了一项行动计划，以促进八年级女孩的体育锻炼。该行动计划纳入了三个主要领域的战略——i)正式课程，ii)学校环境，和iii）家庭/学校/社区联系-基于目标女孩和工作人员的形成数据的结果以及学校的个人需求。研究小组的一名成员在整个干预过程中为每所学校提供支持。主要结果测量是在身体活动中使用的加速度计得出的总身体活动（TPA）。对2011年12月至2012年3月的数据进行分析。
在基线时评估了1518名女孩（平均年龄13.6y±0.02）。从基线到18个月的随访，TPA显着下降，干预和控制学校的女孩之间没有差异。只有三分之一的学校（4/12）根据其行动计划实施了干预措施。对这些学校的按方案分析显示，干预组女孩在MVPA中花费的时间百分比下降较小(调整后的差异为0.5%，95%CI=-0.01,0.99,P=0.05)。
运动中的女孩干预并不能有效地减少青春期女孩身体活动的下降。大多数干预学校缺乏执行是无效效果的主要原因。确定提高执行水平的战略对于确定这种干预方法的真正潜力至关重要。
本研究在澳大利亚新西兰临床试验注册中心ACTRN12610001077055进行回顾性注册。注册日期：2010年12月7日。
24所中学（12个干预和12个对照）的小组随机对照试验。在基线（2009年）和基线后18个月（2010年）进行评估。设置是城市的中学，新南威尔士州的地区和农村地区，澳大利亚。所有在这些学校就读的2009年8年级的女孩都被邀请参加这项研究(N=1769)。使用健康促进学校和行动学习框架，每个学校都成立了一个委员会，并制定了一项行动计划，以促进八年级女孩的体育锻炼。该行动计划纳入了三个主要领域的战略——i)正式课程，ii)学校环境，和iii）家庭/学校/社区联系-基于目标女孩和工作人员的形成数据的结果以及学校的个人需求。研究小组的一名成员在整个干预过程中为每所学校提供支持。主要结果测量是在身体活动中使用的加速度计得出的总身体活动（TPA）。对2011年12月至2012年3月的数据进行分析。
在基线时评估了1518名女孩（平均年龄13.6y±0.02）。从基线到18个月的随访，TPA显着下降，干预和控制学校的女孩之间没有差异。只有三分之一的学校（4/12）根据其行动计划实施了干预措施。对这些学校的按方案分析显示，干预组女孩在MVPA中花费的时间百分比下降较小(调整后的差异为0.5%，95%CI=-0.01,0.99,P=0.05)。
运动中的女孩干预并不能有效地减少青春期女孩身体活动的下降。大多数干预学校缺乏执行是无效效果的主要原因。确定提高执行水平的战略对于确定这种干预方法的真正潜力至关重要。
本研究在澳大利亚新西兰临床试验注册中心ACTRN12610001077055进行回顾性注册。注册日期：2010年12月7日。
