Recruitment and Retention

招聘和保留核心的主要目的是开发和维护一个队列， 在所有项目中使用，并确保项目之间的主题顺利流动 随着时间的推移。核心的具体功能是：1）招募18所高中参与学习 通过允许核心筛选和识别合格的9日和10日年级学生的参与; 2）保持良好的 在整个研究过程中与高中的关系; 3）进行知情同意， 协调各个项目的IRB事务; 4）在学校对青少年进行初步筛查， 5）招募符合条件的青少年及其家长参加 项目; 6）管理和收集所有常见的纸笔问卷调查措施（基线至 36个月），以及30个月时青少年的可替宁样本; 7）追踪和定位缺失 8）协调受试者流动和受试者参与的时间 对于参与多个项目的人; 9）帮助保持数据流的平稳协调， 数据管理、测量和统计核心的核心;以及10）实施小组战略， 减少研究过程中的损耗。我们将使用招聘和保留相结合的方法 程序开发从我们目前的工作与青少年样本（其中我们已经成功地 实现了所有招募目标，并在18个月随访期间保留了90%以上的队列）， 这需要与学校、家长保持良好的关系，并需要对安全性敏感的程序。

The primary purpose of the Recruitmcnt and Retention Core is to develop and maintain a cohort of adolescents and their parents for use in all projects, and to ensure the smooth flow of subjects across projects and over time. The specific functions of the core are to: 1) recruit 18 high schools to participate in the study by allowing the core to screen and identify eligible 9 th and 10 th graders for participation; 2) to maintain good relationships with the high schools throughout the course of the study; 3) to conduct informed consents and coordinate IRB matters across projects; 4) to conduct initial screenings of adolescents at schools to identify students eligible for the longitudinal study; 5) to recruit eligible adolescents and their parents into the projects; 6) to administer and collect all common paper and pencil questionnaire measures (baseline through 36 months), as well as cotinine samples from adolescents at 30 months; 7) to track and locate missing adolescents and parents as they move; 8) to coordinate the subject flow and timing of subject participation for those involved in more than one project; 9) to help maintain smooth coordination of data flow from this core to the Data Management, Measurement, and Statistics Core; and 10) to implement panel strategies to reduce attrition over the course of the study. We will use a combination of recruitment and retention procedures developed from our current work with an adolescent sample (in which we have successfully achieved all recruitment goals and retained more than 90% of a cohort through an 18-month follow-up), which requires good relationships with schools, parents, and adolescent-sensitive procedures.