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首页> 美国卫生研究院文献>Childhood Obesity >The Utility of Geographical Information Systems (GIS) in Systems-Oriented Obesity Intervention Projects: The Selection of Comparable Study Sites for a Quasi-Experimental Intervention Design—TX CORD
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The Utility of Geographical Information Systems (GIS) in Systems-Oriented Obesity Intervention Projects: The Selection of Comparable Study Sites for a Quasi-Experimental Intervention Design—TX CORD

机译：面向系统的肥胖症干预项目中的地理信息系统（GIS）实用性：准实验性干预设计的可比较研究地点的选择-TX CORD

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>Background: The Texas Childhood Obesity Research Demonstration project (TX CORD) uses a systems-oriented approach to address obesity that includes individual and family interventions, community-level action, as well as environmental and policy initiatives. Given that randomization is seldom possible in community-level intervention studies, TX CORD uses a quasi-experimental design. Comparable intervention and comparison study sites are needed to address internal validity bias.>Methods: TX CORD was designed to be implemented in low-income, ethnically diverse communities in Austin and Houston, Texas. A three-stage Geographical Information System (GIS) methodology was used to establish and ascertain the comparability of the intervention and comparison study sites. Census tract (stage 1) and school (stage 2) data were used to identify spatially exclusive geographic areas that were comparable. In stage 3, study sites were compared on demographic characteristics, socioeconomic status (SES), food assets, and physical activity (PA) assets. Student's t-test was used to examine significant differences between the selected sites.>Results: The methodology that was used resulted in the selection of catchment areas with demographic and socioeconomic characteristics that fit the target population: ethnically diverse population; lower-median household income; and lower home ownership rates. Additionally, the intervention and comparison sites were statistically comparable on demographic and SES variables, as well as food assets and PA assets.>Conclusions: This GIS approach can provide researchers, program evaluators, and policy makers with useful tools for both research and practice. Area-level information that allows for robust understanding of communities can enhance analytical procedures in community health research and offer significant contributions in terms of community assessment and engagement.
机译：>背景：德克萨斯州儿童肥胖研究示范项目（TX CORD）使用面向系统的方法来解决肥胖问题，其中包括个人和家庭干预，社区一级的行动以及环境和政策倡议。鉴于在社区一级的干预研究中几乎不可能进行随机分配，因此TX CORD使用了半实验设计。需要有可比的干预和比较研究场所来解决内部有效性偏差。>方法： TX CORD旨在在德克萨斯州奥斯汀和休斯顿的低收入，种族不同的社区中实施。使用三阶段地理信息系统（GIS）方法来建立和确定干预和比较研究地点的可比性。人口普查区域（第1阶段）和学校（第2阶段）数据用于确定可比较的空间排他性地理区域。在第3阶段中，比较了研究地点的人口统计学特征，社会经济地位（SES），食品资产和身体活动（PA）资产。学生的t检验用于检验选定地点之间的显着差异。>结果：所使用的方法导致选择了具有适合目标人群的人口统计和社会经济特征的流域： ;中低家庭收入；并降低房屋拥有率。此外，干预和比较站点在人口统计和SES变量以及食品资产和PA资产方面具有统计可比性。>结论：这种GIS方法可以为研究人员，项目评估人员和政策制定者提供有用的工具用于研究和实践。允许对社区有深入了解的区域级信息可以增强社区卫生研究的分析程序，并在社区评估和参与方面做出重大贡献。

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