Testing Theories of Dietary Behavior Change in Youth Using the Mediating Variable Model with Intervention Programs
Testing Theories of Dietary Behavior Change in Youth Using the Mediating Variable Model with Intervention Programs
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DOI：
10.1016/j.jneb.2009.03.129
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发表时间：
2009-09-01
影响因子：
2.6
通讯作者：
Baranowski, Tom
中科院分区：
文献类型：
--
作者：
Cerin, Ester;Barnett, Anthony;Baranowski, Tom
目的：回顾和批评目前的实验为基础的证据的理论机制的饮食行为改变在青年和提供建议的方式，以加强theory evaluation.Methods：干预措施，检查介质的饮食行为改变在青年（年龄5-18岁），确定通过电子数据库搜索和参考扫描。选定的研究进行了审查的质量和内容和调查结果制成tabuled.Results：七发表的干预措施被发现。所有学校为基础，但差异很大，在饮食的结果，目标人群，措施，调解分析的方法，和理论框架。在更换调解人方面，干预措施相对不成功。自我效能和结果期望是与饮食行为改变最相关的机制。然而，只有结果的期望被确定为介质在多个interventions.Conclusions和影响：很少有干预措施的有效性进行了评估的理论机制的饮食行为改变青年。研究设计和目标人群的可变性使得无法得出关于青年饮食行为改变理论和介质有效性的结论。未来的干预试验需要重点关注中介改变的有效程序，并采用更严格和系统的方法进行理论检验。这可能会导致更有效的干预措施。
Objective: To review and critique current experimentally-based evidence of theoretical mechanisms of dietary behavior chan c in youth and provide recommendations on ways to enhance theory evaluation.Methods: Interventions that examined mediators of dietary behavior change in youth (age 5-18 years) were identified via electronic database searches and reference scanning. Selected studies Were reviewed for quality and content and findings were tabulated.Results: Seven published interventions Were found. All were school-based but differed substantially in dietary outcome, target population, measures, methods of mediation analyses, and theoretical framework. Interventions were relatively unsuccessful in changing mediators. Self-efficacy and outcome expectations were the mechanisms most consistently associated with dietary behavior change. However, only outcome expectancies were identified as mediators in multiple interventions.Conclusions and implications: Few interventions have assessed the validity of theoretical mechanisms of dietary behavior change in Youth. The variability in the design and target populations across studies makes it impossible to draw conclusions regarding the validity of theories and mediators of dietary behavior change in youth. Future intervention trials need to focus on the identification of effective procedures for mediator change and adopt a more rigorous and systematic approach to theory testing. This is likely to result in more effective interventions.