OBESITY PREVENTION IN BLACK TEENS: GO GIRLS! II

这个为期五年的项目名为“Go Girls II”，将为超重的12-16岁非洲裔美国青少年及其父母制定和测试一种干预措施。 该项目将分两个阶段进行：1）形成性研究和试点测试（0-1.5年）;和2）随机田间试验（1.5-5年）。 该项目将在亚特兰大大都会区的中上层社会经济黑人教堂进行。 GG II建立在我们小组之前进行的几项研究基础上，包括Eat for Life，Go Girls I，Keepin' It真实的和Know Your Body。 这项干预措施将进行广泛的试点测试和形成性评估，将包括在教堂举行的小组营养和体育活动会议。 每节课将包括三个组成部分：1）体验式，互动的行为营养和体育活动; 2）30-45分钟的体育活动; 3）准备和食用低脂肪，部分控制膳食和零食。 干预家庭将收到营养教育录像材料，家长将收到一盘运动录音带。 对于一些会议，儿童和家长将共同会见，而对于其他人，打破会议将被使用。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;和S）增加体力活动。 在第1阶段形成性研究期间，我们针对低收入超重非裔美国青少年的GG I干预活动将适应中/高收入非裔美国人口。 第一阶段将在两个教堂进行为期12周的干预试点。 对于第2阶段现场试验，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。参与者将被跟踪一年。 将采用奖励措施加强征聘和留用工作。 主要结局将是肥胖，通过BMI和双能X线吸收测定法进行评估。 次要结果包括;血压、血脂、血清胰岛素、心血管健康、饮食（24小时回忆和FFQ）、体力活动（7天回忆）和认知测量（例如，态度和效能）。 将使用饮食习惯和生长曲线数据评估安全性。 这项研究采用了嵌套队列设计，教会，而不是个人分配到条件。为了控制结局分析中的群集随机化效应，我们将使用SAS/PROC MIXED，以教堂作为分析单位。

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.