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Testing mediator variables in a physical activity intervention for women with type 2 diabetes

机译:在2型糖尿病女性的体育锻炼中测试中介变量

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摘要

A limited understanding of the mechanisms of behavior change has hindered the development of more effective interventions. The aim of this study was to identify potential mediators of objectively measured physical activity (PA) behavior change in women with type 2 diabetes (T2DM). Design: Mediation test of a randomized controlled trial. Method: Women with T2DM (n = 93) from the control group (standard PA materials, n = 44) and the full intervention group (control ± stage-matched printed material and telephone counseling, n = 49) of a larger PA intervention trial were included. PA outcomes were minutes of MET weighted moderate and vigorous PA/week (self-report) and steps/3-days (objective) recorded at baseline and 12-months. Socialcognitive constructs were measured and tested in a mediating variable framework. Results: Perceived behavioral control and barrier self-efficacy mediated intervention effects on objective PA (proportion of intervention effect mediated = 18% and 24% respectively). Intention was a mediator of objective PA (23%). Conclusion: Perceived behavior control, barrier self-efficacy, and intention are effective mechanisms of PA behavior change in women with T2DM.
机译:对行为改变机制的了解有限,阻碍了更有效干预措施的发展。这项研究的目的是确定2型糖尿病(T2DM)妇女客观测量身体活动(PA)行为变化的潜在介体。设计:随机对照试验的中介试验。方法:在较大的PA干预试验中,对照组(标准PA材料,n = 44)和完全干预组(对照组±阶段匹配的印刷材料和电话咨询,n = 49)患有T2DM(n = 93)的女性。被包括在内。 PA结果是在基线和12个月记录的MET加权中度和有力PA的分钟数/周(自我报告)以及步骤/ 3天(客观)。在中介变量框架中对社会认知结构进行了测量和测试。结果:知觉的行为控制和障碍自我效能介导的干预对客观PA的影响(介导的干预作用的比例分别为18%和24%)。意图是目标PA的中介(23%)。结论:知觉行为控制,障碍自我效能感和意图是T2DM女性PA行为改变的有效机制。

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