Mediators of change in physical activity following an intervention in primary care: PACE
Mediators of change in physical activity following an intervention in primary care: PACE
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DOI：
10.1006/pmed.1997.0141
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发表时间：
1997-05-01
影响因子：
5.1
通讯作者：
Ffrench, M
中科院分区：
文献类型：
--
作者：
Calfas, KJ;Sallis, JF;Ffrench, M
背景。当前的研究通过测试干预是否改变了假设的中介以及中介的变化是否与行为改变相关，评估了初级保健中体力活动干预的结构有效性。方法。匹配的医生办公室非随机分配到干预或控制。从医生办公室招募了看似健康、久坐的成年患者 (N = 255)。干预措施是由医生进行简短的、基于行为的咨询，并在两周后进行电话随访。在基线和 4 至 6 周的随访中收集体力活动和调节因素的评估。假设的中介因素是变化过程、自我效能和锻炼的社会支持。结果。接受咨询的患者在行为和认知过程的变化方面比对照组有显着改善。中介者的其他变化并不显着。变化的行为过程和自我效能对解释自我报告和身体活动的客观测量的多元回归模型做出了重大贡献。结论。干预措施影响了身体活动变化的一些目标调节因素。无论实验条件和其他变量如何，三个中介变量中的两个与身体活动的变化相关。干预措施的结构有效性得到部分支持。 (C) 1997 年学术出版社。
Background. The current study evaluated the construct validity of a physical activity intervention in primary care by testing whether the intervention changed hypothesized mediators and whether changes in the mediators were associated with behavior change.Methods. Matched physician offices were non-randomly assigned to intervention or control. Apparently healthy, sedentary, adult patients (N = 255) were recruited from physician offices. The intervention was brief, behaviorally based counseling by physicians, plus a telephone follow-up 2 weeks later. Assessments of physical activity and mediators were collected at baseline and at 4- to 6-week follow-up. Hypothesized mediators were processes of change, self-efficacy, and social support for exercise.Results. Patients who were counseled improved significantly more than those in the control group on behavioral and cognitive processes of change. Other changes in mediators were nonsignificant. Behavioral processes of change and self-efficacy made significant contributions to the multiple regression model explaining self-report and objective measures of physical activity.Conclusions. The intervention affected some of the targeted mediators of physical activity change. Two of three mediator variables were associated with changes in physical activity regardless of experimental condition and other variables. The construct validity of the intervention was partially supported. (C) 1997 Academic Press.