在一项基于电话的肥胖预防研究中,对干预的忠实性进行客观编码。

Journal of Obesity and Overweight Pub Date : 2015-01-01 Epub Date: 2015-05-26
Meghan M JaKa, Elisabeth M Seburg, Alison M Roeder, Nancy E Sherwood
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引用次数: 0

摘要

背景:儿童肥胖预防研究的结果令人失望。了解干预措施的忠实性对于解释干预措施成功(或失败)的原因以及最终改进未来的干预措施非常必要。尽管如此,肥胖预防文献中并没有持续报告干预的忠实性。本研究的目的是制定并使用编码协议,以客观评估针对学龄前儿童家长的电话肥胖预防研究中干预的忠实性:干预者和独立编码员都完成了会话保真度测量,包括目标领域(媒体使用、体育活动等)所花费的时间和目标设定质量的组成部分。编码员还对参与者的参与度进行了评分。表中列出了干预者和编码者评分之间的一致性、忠实度水平以及忠实度组成部分随时间的变化。在报告讨论不同目标领域所花费的时间时,编码者和干预者表现出高度一致。在目标质量方面,干预者对自己的评分一直高于独立编码者。编码者对疗程质量的评分最初很高,但在八个疗程中,某些部分的评分略有下降:讨论了干预忠实度测量和分析的未来方向,包括利用忠实度测量随时间的变化来预测研究结果。更深入地了解干预的忠实度有可能加强肥胖干预。
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Objectively coding intervention fidelity during a phone-based obesity prevention study.

Background: Childhood obesity prevention studies have yielded disappointing results. Understanding intervention fidelity is necessary in explaining why interventions are (or are not) successful and ultimately improving future intervention. In spite of this, intervention fidelity it is not consistently reported in the obesity prevention literature. The purpose of the current study was to develop and utilize a coding protocol to objectively assess intervention fidelity in a phone-based obesity prevention study for parents of preschool-aged children.

Findings: Both interventionists and independent coders completed session fidelity measures including time spent on target areas (media use, physical activity, etc.) and components of goal setting quality. Coders also rated participant engagement. Agreement between ratings by interventionists and coders, fidelity levels and changes in fidelity components over time are presented. Coders and interventionists showed high agreement when reporting time spent discussing different target areas. Interventionists consistently rated themselves higher than independent coders on measures of goal quality. Coder ratings of session quality were initially high, but some components declined slightly across the eight sessions.

Conclusions: Future directions for intervention fidelity measurement and analysis are discussed, including utilizing changes in fidelity measures over time to predict study outcomes. Obtaining a more in-depth understanding of intervention fidelity has the potential to strengthen obesity interventions.

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