Evaluation of a District-Wide Initiative to Improve School Meal Consumption and Physical Activity Levels among Elementary Students in Anchorage, Alaska

对提高阿拉斯加州安克雷奇小学生学校膳食消耗和身体活动水平的全区举措进行评估

• 批准号: 10550056
• 负责人: Juliana FW Cohen
• 金额: $ 4.01万
• 依托单位: MERRIMACK COLLEGE
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-31 至 2024-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10550056
• 关键词: Accelerometer; Address; Alaska; Alaska Native; American Indians; Area; Behavior; Body mass index; Child; Child Health; Consumption; Data; Data Collection; Development; Diet; Dietary intake; Effectiveness; Energy Intake; Ensure; Evaluation; Family; Funding; Habits; Hunger; Location; Measurement; Measures; Methodology; Movement; Natural experiment; Obesity; Outcome; Performance; Physical activity; Policies; Population; Recommendation; Scanning; School Nursing; Schools; Site Visit; Sleep; Standardization; Students; Surveys; Testing; Time; Visit; Weight; cost effective; dietary; elementary school; ethnic minority; evidence base; experience; fourth grade; health disparity; implementation fidelity; improved; innovation; nutrition; obesity prevention; obesity risk; post implementation; racial and ethnic; school district; socioeconomic disadvantage; teacher; wasting

Contact PD/PI: Cohen, Juliana FW PROJECT SUMMARY Improving children’s diets and physical activity levels are key strategies to reduce the risk of obesity. However, most children do not meet dietary or physical activity recommendations, and children who are from families with socioeconomic disadvantages and/or who are racial/ethnic minorities experience disproportionately higher rates of obesity, with Alaska Native/American Indian children experiencing the highest rates nationally. Schools can be an ideal location to promote healthier habits as children spend a substantial portion of their time in school and often consume up to half their daily energy intake there. Two promising, cost-effective school policies are longer lunch periods and longer recess with integrated PA opportunities, but rigorous evidence is lacking. In this time-sensitive proposal, we propose to evaluate a natural experiment in Anchorage, Alaska of the implementation of a wellness initiative in elementary schools that includes 30 minute lunch periods and 54 minutes of PA daily (including 30 minutes of recess in addition to classroom movement activities). The wellness initiative will have a staggered rollout in schools over the span of four years. Our study will collect longitudinal data from 4,000 students in K-4th grade to assess changes in school meal consumption using plate waste methodology (Aim 1). Physical activity levels will also be assessed in a subsample of children (n=2,000 students in grades K-4) using accelerometer measurements (Aim 2). Outcomes will be measured at baseline and post-implementation the following school year (collected during the same month at each time point). Additionally, BMI, sleep duration and quality, and other factors related to academic performance (i.e., changes in students’ disruptive classroom behaviors [measured at baseline and one year post-implementation], disciplinary referrals to the principal, hunger-related visits to the school nurse, and standardized test scores [baseline and up to four years post-implementation]) will be evaluated. Implementation fidelity will be assessed throughout the study period via site visits, environmental scans, and teacher surveys. Anchorage School District plans the staggered implementation of the initiative to begin in the 2021-22 school year. Thus, time- sensitive funding is critical to ensure adequate time for baseline data collection. The proposal’s significance lies in our ability to provide the first empirical evidence of the degree to which school policies for longer lunch periods and integrated physical activity opportunities influence students’ dietary intakes, physical activity levels, weight status, and factors related to academic performance. This rigorous, innovative, and time-sensitive study will contribute to the development of a comprehensive evidence base on the potential effectiveness of school nutrition and physical activity policies, which can help to address health disparities in children, including among an underserved and understudied Alaska Native population. Study results will also provide essential evidence to inform local, state, and federal policymakers’ decisions regarding school nutrition and physical activity policies as well as have the strong potential to impact children’s health more broadly. Project Summary/Abstract Page 7

联系PD/PI：Cohen、Juliana FW 项目摘要 改善儿童的饮食和体育活动水平是降低肥胖风险的关键策略。然而，在这方面， 大多数儿童不符合饮食或体育活动的建议， 处于社会经济不利地位和/或属于少数种族/族裔的人 肥胖率，阿拉斯加土著/美洲印第安儿童的肥胖率在全国最高。学校 可以是一个理想的位置，以促进健康的习惯，因为孩子们花了很大一部分时间在 在学校，他们每天的能量摄入量往往有一半是在那里。两所前景看好、性价比高的学校 政策是更长的午餐时间和更长的休息时间与综合PA的机会，但严格的证据是， 缺乏在这个时间敏感的建议中，我们建议评估阿拉斯加安克雷奇的一个自然实验， 在小学实施健康倡议，包括30分钟的午餐时间和54 每天30分钟的私人助理（包括30分钟的课间休息和教室活动）。的 健康倡议将在四年内在学校交错推出。我们的研究将收集 从4,000名K-4年级学生的纵向数据，以评估学校膳食消费的变化， 废物处理方法（目标1）。还将在儿童子样本（n= 2，000）中评估身体活动水平 学生在年级K-4）使用加速度计测量（目标2）。将在基线时测量结局 以及实施后的下一学年（在同一个月的每个时间点收集）。 此外，BMI、睡眠时间和质量以及其他与学习成绩相关的因素（即，变化 学生的破坏性课堂行为[在基线和实施后一年测量]， 纪律转介给校长，饥饿相关的访问学校护士，和标准化的考试成绩 [基线和实施后最多四年]）。将评估实施的可靠性 在整个研究期间，通过实地考察、环境扫描和教师调查。安克雷奇学校 学区计划在2021-22学年开始交错实施该倡议。因此，时间- 敏感的供资对于确保有足够的时间收集基线数据至关重要。提案的意义 在于我们有能力提供第一个经验证据，证明学校的午餐时间延长政策 时间和综合体育活动机会影响学生的饮食摄入量，体育活动水平， 体重状况以及与学习成绩相关的因素。这项严谨、创新和时间敏感的研究 将有助于建立一个全面的证据基础，说明学校的潜在效益。 营养和体育活动政策，这有助于解决儿童健康方面的差距， 一个未得到充分服务和研究的阿拉斯加土著人口。研究结果还将提供必要的证据 为地方、州和联邦决策者关于学校营养和体育活动的决策提供信息 政策的影响，并有很大的潜力，更广泛地影响儿童的健康。 项目摘要/摘要第7页