School of Nursing.chool of Social Work, University of North Carolina, Chapel Hill, NC 27599, USA.
Health Educ Res. 2012 Apr;27(2):307-18. doi: 10.1093/her/cyr107. Epub 2011 Dec 8.
Process evaluation is an assessment of the implementation of an intervention. A process evaluation component was embedded in the HEALTHY study, a primary prevention trial for Type 2 diabetes implemented over 3 years in 21 middle schools across the United States. The HEALTHY physical education (PE) intervention aimed at maximizing student engagement in moderate-to-vigorous physical activity through delivery of structured lesson plans by PE teachers. Process evaluation data collected via class observations and interventionist interviews assessed fidelity, dose delivered, implementor participation, dose received and barriers. Process evaluation results indicate a high level of fidelity in implementing HEALTHY PE activities and offering 225 min of PE every 10 school days. Concerning dose delivered, students were active for approximately 33 min of class, representing an average of 61% of the class time. Results also indicate that PE teachers were generally engaged in implementing the HEALTHY PE curriculum. Data on dose received showed that students were highly engaged with the PE intervention; however, student misbehavior was the most common barrier observed during classes. Other barriers included teacher disengagement, large classes, limited gym space and poor classroom management. Findings suggest that the PE intervention was generally implemented and received as intended despite several barriers.
过程评估是对干预措施实施情况的评估。在一项针对 2 型糖尿病的初级预防试验——HEALTHY 研究中嵌入了一个过程评估部分，该研究在美国 21 所中学进行了 3 年。HEALTHY 体育课（PE）干预旨在通过体育教师提供结构化的课程计划，最大限度地提高学生参与中等至剧烈强度身体活动的积极性。通过课堂观察和干预者访谈收集的过程评估数据评估了保真度、提供的剂量、实施者参与度、接受的剂量和障碍。过程评估结果表明，在实施 HEALTHY PE 活动和每 10 个上学日提供 225 分钟的 PE 方面具有高度的保真度。关于提供的剂量，学生在课堂上活跃约 33 分钟，占课堂时间的平均 61%。结果还表明，体育教师普遍参与实施 HEALTHY PE 课程。关于接受剂量的数据表明，学生高度参与 PE 干预；然而，学生的不良行为是课堂上观察到的最常见障碍。其他障碍包括教师不参与、班级规模大、体育馆空间有限和课堂管理不善。研究结果表明，尽管存在一些障碍，但 PE 干预通常按计划实施并得到了预期的效果。
