Away From Home and Out of School

离家出学

基本信息

批准号：
7487860
负责人：
Deborah A Cohen
金额：
$ 69.7万
依托单位：
RAND CORPORATION
依托单位国家：
美国
项目类别：
财政年份：
2002
资助国家：
美国
起止时间：
2002-08-10 至 2011-05-31
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): The proposed study will build on information collected in our previous study, "Community Characteristics and Physical Activity among Adolescent Girls", which was an ancillary study to TAAG, Trial of Activity of Adolescent Girls. We will follow the same girls from the Minneapolis and San Diego TAAG sites and identify where they go when they are not in school or home by using portable global positioning system (GPS) units, unobtrusive devices worn on the wrist or hip that record the latitude and longitude of locations at user-specified time intervals. GPS will be combined with accelerometry and self-reports of food purchases and consumption so that we will be able to determine the context in which physical activity and eating occurs in neighborhoods. In the baseline study we found associations between neighborhood characteristics such as parks and playgrounds and physical activity, but could not determine if girls were active in these settings or whether increased levels of physical activity were due to community norms. Our specific aims are: 1) To identify the specific environmental exposures to food sources and activity venues based upon actual travel patterns of older adolescent girls. 2) To study the trajectory of physical activity in older adolescent girls, how physical activity patterns change when girls and their peers become more autonomous, and to identify the environments in which girls are physically active and the characteristics of those environments, 3) To study the trajectory of BMI among adolescent girls as they grow into adulthood and determine if eating away from home is associated with neighborhood food environments, BMI, and with changes in BMI. We will obtain both dietary and physical activity data from 300 girls at two timepoints, half will be in 10th grade at the first measurement and the other half in 11th grade. The second measurement will be in the 11th and 12th grades in order to understand how diet and physical activity change as girls become more autonomous, obtain driving licenses and spend more time in cars alone or with peers. We will analyze the data using propensity scoring and longitudinal growth models to identify how local environments may play a role in physical activity, diet and BMI. The findings will be useful to inform future community and population level interventions to promote healthy eating, active living, and obesity control.

描述（由申请人提供）：拟议的研究将基于我们先前的研究“青少年女孩的社区特征和体育活动”中收集的信息，这是对塔格的辅助研究，《青少年女孩活动的试验》。我们将跟随来自明尼阿波利斯和圣地亚哥塔格塔格网站的同一女孩，并通过使用便携式全球定位系统（GPS）单元，戴在腕部上的不受欢迎的设备或髋关节记录用户指定时间间隔的纬度和经度位置时，确定他们不在学校或家庭时的去向。全科医生将与食物购买和消费的加速度计和自我报告相结合，以便我们能够确定社区中体育活动和饮食的背景。在基线研究中，我们发现诸如公园和游乐场和体育锻炼之类的邻里特征之间的关联，但无法确定女孩在这些环境中是否活跃，或者是由于社区规范而导致的体育锻炼水平是否增加。我们的具体目的是：1）根据年龄较大的青少年女孩的实际旅行方式确定食物来源和活动场所的特定环境暴露。 2）研究年长的青少年女孩的体育锻炼轨迹，当女孩及其同龄人变得更加自主时，身体活动模式如何变化，并确定女孩在体育运动和这些环境的特征的环境，3）以研究BMI在成长中成长为Adulthood并与家中饮食相关的环境与BMI相关联，BMI和BMI与BMI相关联。我们将在两个时间点获得来自300名女孩的饮食和体育活动数据，一半将在第一年的测量中，而另一半则在11年级。第二次测量将是11年级和12年级，以了解随着女孩变得更加自主，获得驾驶许可并在汽车上或与同伴一起花更多的时间时，饮食和身体活动如何变化。我们将使用倾向评分和纵向增长模型来分析数据，以确定本地环境如何在体育锻炼，饮食和BMI中发挥作用。这些发现将有助于告知未来的社区和人口水平干预措施，以促进健康的饮食，积极的生活和肥胖。