Developing Health Behaviors in Middle Adolescence

描述（由申请人提供）：拟议研究的目的是建立在正在进行的4- 8年级学生健康风险行为研究[R01-HD39554]的基础上，通过跟踪三个原始队列（4-6年级）到高中。具体目标是：1。比较不同性别和种族的青少年（9 -12年级）的环境/风险因素、保护资源和健康行为。2. 探讨环境/风险因素、保护资源和青少年健康行为如何随时间变化。3. 确定哪一组环境/风险因素和保护性资源最能预测每年青春期中后期（4-12年级）的健康促进行为和健康风险行为。4. 描述青少年从事促进健康行为和危害健康行为的动机。将采用队列序列设计从居住在德克萨斯州中部的1186名青少年及其父母的可访问的多种族样本中收集数据。由有效的研究工具组成的调查，以测量弹性模型中的理论变量，将在青少年家中使用音频-计算机辅助调查访谈（a - casi）技术进行为期四年的年度调查。这种设计允许横截面和纵向数据分析。正在进行的研究的数据加上拟议研究中收集的新数据将结合使用一般线性模型，广义线性模型和一般线性混合模型（HLM）来回答研究问题和检验假设。第四个具体目标的定性数据将从三个队列中随机抽取25名9年级学生，并使用显性和潜在内容分析进行分析。调查结果将有助于公共卫生，为制定具体干预措施提供信息，针对与个人在生命第二个十年中的主要发病率和死亡率有关的多种行为，特别是处于不利地位的、农村的、种族和族裔少数群体。

DESCRIPTION (provided by applicant): The purpose of the proposed study is to build on an ongoing study of health-risk behaviors in 4th-8th graders [R01-HD39554] by following three original cohorts(4-6th graders) through high school. Specific aims are to: 1. Compare the contextual/risk factors, protective resources and health-behaviors of adolescents (9th-12th graders) by gender, and ethnicity. 2. Explore how contextual/risk factors, protective resources, and health behaviors of adolescents change overtime. 3. Determine which set of contextual/risk factors and protective resources best predict health-promoting behaviors and health-risk behaviors in each year of middle-to-late adolescence (grades 4-12). 4. Describe adolescents' motivations for engaging in health-promoting behaviors and health-risk behaviors. A cohort-sequential design will be used to collect data from an accessible, multi-ethnic sample of 1186 adolescents and their parents residing in central Texas. Surveys consisting of valid research instruments to measure theoretical variables in a resilience model will be administered annually for four years in adolescents' homes using audio-computer-assisted survey interviewing (A-CASI) techniques. This design allows for both cross-sectional and longitudinal data analysis. Data from the ongoing study plus new data collected in the proposed study will be combined to answer the research questions and test hypotheses using general linear models, generalized linear models, and general linear mixed models (HLM). Qualitative data to meet the fourth specific aim will be collected from a random sample of 25 9th graders from each of the three cohorts and analyzed using manifest and latent content analysis. Findings will contribute to the public health by providing information from which to develop specific interventions that target multiple behaviors associated with the major morbidities and mortalities of individual in the second decade of life, particularly disadvantaged, rural, racial and ethnic minorities.