Physical activity and fatigue in breast cancer survivors: a panel model examining the role of self-efficacy and depression.
Physical activity and fatigue in breast cancer survivors: a panel model examining the role of self-efficacy and depression.
复制标题
乳腺癌幸存者的体育锻炼和疲劳：研究自我效能和抑郁症的作用的小组模型。
DOI：
10.1158/1055-9965.epi-12-0983
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发表时间：
2013-05
期刊：
影响因子：
--
通讯作者：
McAuley E
中科院分区：
文献类型：
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作者：
Phillips SM;McAuley E
体力活动与乳腺癌幸存者疲劳的减少有关。然而，这种关系背后的机制还没有得到很好的理解。本研究的目的是纵向测试的自我效能和抑郁症的作用，作为潜在的介质之间的关系，在乳腺癌幸存者的样本使用自我报告和客观措施的体力活动和疲劳的模型检查。所有参与者（N= 1527）在基线和6个月时完成了身体活动，自我效能，抑郁和疲劳的自我报告措施。随机选择一个子样本在两个时间点佩戴加速计。据推测，体力活动通过自我效能和抑郁间接影响疲劳。在协方差建模框架内使用面板分析在6个月期间检查模型结构之间的关系。当控制协变量时，假设模型在全样本中提供了良好的模型-数据拟合（X2 = 599.66，df = 105，p = < 0.001; CFI= 0.96; SRMR= 0.02）。在基线时，体力活动通过自我效能和抑郁间接影响疲劳。这些关系也得到了时间的支持。此外，大多数假设关系在具有加速度计数据月的子样本中得到支持（χ2 = 387.48，df = 147，p = <0.001，CFI = 0.94，SRMR= 0.04）。这项研究提供的证据表明，体力活动和疲劳乳腺癌幸存者之间的关系可能是介导的更近端的，可修改的结果的体力活动参与。对今后的应用和研究提出了建议。
Physical activity is associated with reductions in fatigue in breast cancer survivors. However, mechanisms underlying this relationship are not well understood. The purpose of this study was to longitudinally test a model examining the role of self-efficacy and depression as potential mediators of the relationship between physical activity and fatigue in a sample of breast cancer survivors using both self-report and objective measures of physical activity. All participants (N= 1527) completed self-report measures of physical activity, self-efficacy, depression and fatigue at baseline and 6 months. A subsample was randomly selected to wear an accelerometer at both time points. It was hypothesized that physical activity indirectly influences fatigue via self-efficacy and depression. Relationships among model constructs were examined over the 6 month period using panel analysis within a covariance modeling framework. The hypothesized model provided a good model-data fit (X2 = 599.66, df = 105, p = < 0.001; CFI= 0.96; SRMR= 0.02) in the full sample when controlling for covariates. At baseline, physical activity indirectly influenced fatigue via self-efficacy and depression. These relationships were also supported across time. Additionally, the majority of the hypothesized relationships were supported in the subsample with accelerometer data months (χ2 = 387.48, df = 147, p = <0.001, CFI = 0.94, SRMR= 0.04). This study provides evidence to suggest the relationship between physical activity and fatigue breast cancer survivors may be mediated by more proximal, modifiable outcomes of physical activity participation. Recommendations are made relative to future applications and research concerning these relationships.