College of Nursing, University of South Carolina, Columbia, SC, USA.
Centers for Behavioral and Preventive Medicine, The Miriam Hospital, Warren Alpert Medical School of Brown University, Providence, RI, USA.
J Behav Med. 2020 Aug;43(4):605-613. doi: 10.1007/s10865-019-00085-6. Epub 2019 Aug 3.
The purpose of this study is to explore the mediators associated with physical activity (PA) within the adoption and maintenance phase of a PA intervention trial among breast cancer survivors. Overall, 192 breast cancer survivors (average age = 55.9 years) were randomized to an Intervention or Control group. Both groups received 8 calls in the first 3-months, 3 monthly calls, and then entered a no-contact maintenance phase for the remaining 6-months. Assessments were completed at baseline, 3-months, 6-months and 12-months. On average, participants were 55.9 years of age (SD = 9.8) and 2.9 years since diagnosis (SD = 2.2). In the adoption phase, all significant univariate mediators (self-efficacy, cognitive and behavioral processes and decisional balance cons) were included in the multivariate model. Results suggest self-efficacy (ab = 13.56, SE = 7.04) and behavioral processes (ab = 36.10, SE = 12.22) were significant for PA adoption. No mediators were identified in the maintenance phase. In the adoption phase, there were significant indirect effects of group on PA adoption through self-efficacy and behavioral processes. There were no indirect effects of group on PA maintenance.
本研究旨在探讨乳腺癌幸存者接受身体活动（PA）干预试验的采用和维持阶段与 PA 相关的中介因素。共有 192 名乳腺癌幸存者（平均年龄=55.9 岁）被随机分配到干预组或对照组。两组在头 3 个月都接受了 8 次电话随访，然后进入 6 个月的无接触维持阶段。在基线、3 个月、6 个月和 12 个月进行评估。平均而言，参与者的年龄为 55.9 岁（标准差=9.8），诊断后 2.9 年（标准差=2.2）。在采用阶段，所有显著的单变量中介因素（自我效能、认知和行为过程以及决策平衡反对意见）都包含在多变量模型中。结果表明，自我效能（ab=13.56，SE=7.04）和行为过程（ab=36.10，SE=12.22）对 PA 的采用具有显著影响。在维持阶段未发现中介因素。在采用阶段，通过自我效能和行为过程，组对 PA 采用有显著的间接影响。但在 PA 维持阶段，组对 PA 维持没有间接影响。
