Theoretical and Behavioral Mediators of a Weight Loss Intervention for Men
Theoretical and Behavioral Mediators of a Weight Loss Intervention for Men
复制标题
DOI：
10.1007/s12160-016-9774-z
复制
发表时间：
2016-06-01
影响因子：
3.8
通讯作者：
Tate, Deborah F.
中科院分区：
文献类型：
--
作者：
Crane, Melissa M.;Ward, Dianne S.;Tate, Deborah F.
尽管肥胖率相似，但目前男性在减肥试验中的代表性不足，这限制了我们对男性治疗最有效因素的理解。本研究的目的是测试理论（自主动机，自我效能，结果预期和自我调节）和行为（卡路里摄入，身体活动，自我称重）的中介，仅限男性，互联网提供的减肥干预侧重于创新和量身定制的治疗元素，专门为男性。数据来自一项为期6个月的随机试验（N = 107），将干预措施与等候名单对照组进行比较。在单介质模型和多介质模型中，测试了基线和3个月间理论介质的变化作为干预效果对6个月体重变化的中介。基线和6个月之间的行为变化以相同的方式进行测试。与对照组相比，干预产生了更大的体重减轻（-5.57 kg +/- 6.6 vs -0.65 kg +/- 3.3, p < 0.001），并且大多数理论和行为介质发生了显著变化（p < 0.05）。在多个中介模型中，饮食相关的自主动机、自我效能和自我调节的变化都在干预与体重减轻的关系中起着显著的中介作用。干预效果也通过饮食摄入量和自称频率的变化介导。通过在多介质背景下测试该干预的理论介质，本研究有助于了解当前与男性减肥干预措施发展相关的知识，并建议干预措施应针对饮食为重点的结构。
Men are currently underrepresented in weight loss trials despite similar obesity rates, which limit our understanding about the most effective elements of treatment for men. The purpose of this study was to test the theoretical (autonomous motivation, self-efficacy, outcome expectancies, and self-regulation) and behavioral (calorie intake, physical activity, self-weighing) mediators of a men-only, Internet-delivered weight loss intervention focused on innovative and tailored treatment elements specifically for men.Data comes from a 6-month randomized trial (N = 107) testing the intervention compared to a waitlist control group. Changes in the theoretical mediators between baseline and 3 months were tested as mediators of the intervention effect on weight change at 6 months in both single and multiple mediator models. Changes in behaviors between baseline and 6 months were tested in the same manner.The intervention produced greater weight losses compared to the control group (-5.57 kg +/- 6.6 vs. -0.65 kg +/- 3.3, p < 0.001) and significant changes (p's < 0.05) in most of the theoretical and behavior mediators. In multiple mediator models, changes in diet-related autonomous motivation, self-efficacy, and self-regulation all significantly mediated the relationship between the intervention and weight loss. The intervention effect was also mediated by changes in dietary intake and self-weighing frequency.By testing the theoretical mediators of this intervention in a multiple mediator context, this study contributes to current knowledge related to the development of weight loss interventions for men and suggests that interventions should target diet-focused constructs.