McDermott M S, Oliver M, Simnadis T, Beck E J, Coltman T, Iverson D, Caputi P, Sharma R
School of Computing and Information Technology, Faculty of Engineering and Information Sciences, University of Wollongong, NSW 2522, Australia.
School of Computing and Information Technology, Faculty of Engineering and Information Sciences, University of Wollongong, NSW 2522, Australia.
Prev Med. 2015 Dec;81:150-6. doi: 10.1016/j.ypmed.2015.08.020. Epub 2015 Sep 5.
Promoting adherence to healthy dietary patterns is a critical public health issue. Models of behaviour, such as the Theory of Planned Behaviour (TPB) allow programme designers to identify antecedents of dietary patterns and design effective interventions. The primary aim of this study was to examine the association between TPB variables and dietary patterns.
A systematic literature search was conducted to identify relevant studies. Random-effects meta-analysis was used to calculate average correlations. Meta-regression was used to test the impact of moderator variables.
In total, 22 reports met the inclusion criteria. Attitudes had the strongest association with intention (r+=0.61) followed by perceived behavioural control (PBC, r+=0.46) and subjective norm (r+=0.35). The association between intention and behaviour was r+=0.47, and between PBC and behaviour r+=0.32. Moderator analyses revealed that younger participants had stronger PBC-behaviour associations than older participants had, and studies recording participants' perceptions of behaviour reported significantly higher intention-behaviour associations than did those using less subjective measures.
TPB variables were found to have medium to large associations with both intention and behaviour that were robust to the influence of key moderators. Recommendations for future research include further examination of the moderation of TPB variables by age and gender and the use of more valid measures of eating behaviour.
促进对健康饮食模式的依从性是一个关键的公共卫生问题。行为模型，如计划行为理论（TPB），使项目设计者能够识别饮食模式的影响因素并设计有效的干预措施。本研究的主要目的是检验TPB变量与饮食模式之间的关联。
进行系统的文献检索以识别相关研究。采用随机效应荟萃分析来计算平均相关性。使用元回归来检验调节变量的影响。
总共22篇报告符合纳入标准。态度与意图的关联最强（r += 0.61），其次是感知行为控制（PBC，r += 0.46）和主观规范（r += 0.35）。意图与行为之间的关联为r += 0.47，PBC与行为之间的关联为r += 0.32。调节分析显示，年轻参与者的PBC与行为的关联比年长参与者更强，记录参与者行为感知的研究报告的意图与行为关联显著高于使用主观性较低测量方法的研究。
发现TPB变量与意图和行为之间存在中等至较大的关联，且对关键调节因素的影响具有稳健性。对未来研究的建议包括进一步研究年龄和性别对TPB变量的调节作用，以及使用更有效的饮食行为测量方法。
