OBESITY PREVENTION IN BLACK TEENS: GO GIRLS! II

这项名为“Go Girls II”的项目为期五年，将开发和测试针对12-16岁非裔美国青少年及其父母超重的干预措施。该项目将分两个阶段进行：1)成型研究和中试(第0-1.5年)；和2)随机实地试验(第1.5-5年)。该项目将在亚特兰大大都市区的中上层社会经济黑人教堂进行。GG II建立在我们团队之前进行的几项研究的基础上，包括Eat for Life、Go Girls I、Keepin‘It Real和Know Your Body。这项干预将接受广泛的试点测试和形成性评估，将包括在教堂进行的团体营养和体育活动课程。每节课将包括三个部分：1)体验式、互动式的行为营养和体育活动；2)30-45分钟的体育活动；3)准备和食用低脂、控制份量的膳食和零食。干预家庭将收到营养教育视频材料，父母将收到运动录音带。对于一些会议，孩子和家长将联合举行会议，而对于其他会议，将使用分组会议。干预的目标行为包括：1)增加水果和蔬菜的摄入量；2)减少脂肪的摄入量；3)减少快餐的摄入量；4)减少看电视；以及S)增加体力活动。在第一阶段形成性研究期间，我们针对低收入超重非裔美国人青少年的GG I干预活动将适用于中等/高收入非裔美国人人口。第一阶段将在为期12周的干预两座教堂的试点中达到高潮。对于第二阶段的实地试验，6-9个教堂(每个教堂招募25-30个家庭)将被随机分配到治疗或比较条件下。参与者将被跟踪一年。激励措施将用于加强招聘和留住员工。主要结果将是肥胖，通过BMI和双能X射线吸收测量法进行评估。次要结果包括：血压、血脂、血清胰岛素、心血管健康、饮食(24小时召回和FFQ)、体力活动(7天召回)和认知测量(例如，态度和疗效)。安全性将使用饮食习惯和生长曲线数据进行评估。这项研究采用了嵌套队列设计，教堂，而不是个人分配条件。为了控制结果分析中的集群随机化效应，我们将使用SAS/PROC混合，以教堂为分析单位。

This five-year project, titled "Go Girls II", will develop and test an intervention for overweight 12-16 year old African American adolescents and their parents. The project will be conducted in two stages: 1) Formative Research and Pilot Testing (Years 0-1.5); and 2) Randomized Field Trial (Years 1.5-5). The Project will be conducted in middle and upper socioeconomic Black churches in the Atlanta Metropolitan area. GG II builds on several prior studies conducted by our group including Eat for Life, Go Girls I, Keepin' It Real, and Know Your Body. The intervention, which will undergo extensive pilot testing and formative evaluation, will include group nutrition and physical activity sessions conducted at churches. Each session will comprise three components; 1) experiential, interactive behavioral nutrition and physical education activity; 2) 30-45 minutes of physical activity; and 3) preparation and consumption of low-fat, portion controlled meals and snacks. Intervention families will receive nutrition education video materials and parents will receive an exercise audio tape. For some sessions, children and parents will meet jointly, while for others, break out sessions will be used. Target behaviors for the intervention include: 1) increased fruit and vegetable intake; 2) decreased fat intake; 3) decreased fast food intake; 4) decreased television viewing; and S) increased physical activity. During Stage 1 formative research, activities from our GG I intervention, which targeted low income overweight African American adolescents, will be adapted to a middle/upper income African American population. Stage 1 will culminate in a 12-week pilot of the intervention in two churches. For the Stage 2 field trial 6-9 churches (25-30 families recruited per church) will be randomly assigned to treatment or comparison condition. Participants will be tracked for one year. Incentives will be used to enhance recruitment and retention. The primary outcome will be adiposity, assessed by BMI and Dual Energy X-ray Absorptiometry. Secondary outcomes include; blood pressure, blood lipids, serum insulin, cardiovascular fitness, diet (24hr recalls and FFQ), physical activity (7-day recall), and cognitive measures (e.g., attitudes and efficacy). Safety will be evaluated using eating practices and growth curve data. The study employs a nested cohort design, with churches, rather than individuals assigned to condition. To control for cluster randomization effects in outcome analyses, we will utilize SAS/PROC MIXED, with church as the unit of analysis.