The University of Texas at Tyler, 3900 University Blvd, Tyler, TX 75799, USA.
Cancer Nurs. 2011 Jul-Aug;34(4):322-34. doi: 10.1097/NCC.0b013e3181f9a300.
More than 192 000 US women faced the challenge of living with breast cancer in 2009. Although exercise may help combat treatment-related symptoms, cancer-related fatigue has been identified as a potential barrier to engaging in physical activity. Self-efficacy has been proposed to mediate the impact of cancer-related fatigue on physical activity and subsequently improve quality of life (QOL).
The purpose of this study was to determine the linkages among the concepts of an introductory model of fatigue related to cancer, self-efficacy for physical activity, physical activity, and QOL in women being treated for breast cancer.
INTERVENTIONS/METHODS: Women currently receiving treatment for breast cancer were asked to complete 5 instruments: demographic profile, Piper Fatigue Scale, Physical Activity Assessment Inventory, Human Activity Profile, and McGill QOL Questionnaire. Structural equation modeling of the data was performed to determine the direct and indirect influences of study variables on QOL.
The model was tested based on responses of 73 participants. All paths between variables were significant. The model explained 53% of the variance in QOL scores, 28% of the variance in physical activity, and 31% of the variance in self-efficacy.
Although fatigue is most commonly thought of as a physical problem requiring physical intervention, this study provides emerging evidence to suggest there may be potential interventions to improve self-efficacy that may mediate the effect of fatigue on QOL.
Interventions to improve self-efficacy may contribute to increased physical activity and improved QOL in this population.
2009 年，超过 192000 名美国女性面临乳腺癌的挑战。尽管锻炼有助于对抗与治疗相关的症状，但癌症相关疲劳已被确定为参与体育活动的潜在障碍。自我效能感被认为可以调节癌症相关疲劳对体育活动的影响，从而提高生活质量（QOL）。
本研究旨在确定与癌症相关的疲劳的介绍性模型、体育活动自我效能感、体育活动和女性乳腺癌治疗中的生活质量（QOL）这几个概念之间的联系。
干预/方法：目前正在接受乳腺癌治疗的女性被要求完成 5 种工具：人口统计学简介、派珀疲劳量表、体育活动评估清单、人类活动概况和麦吉尔生活质量问卷。对数据进行结构方程建模，以确定研究变量对 QOL 的直接和间接影响。
该模型是基于 73 名参与者的反应进行测试的。所有变量之间的路径都是显著的。该模型解释了 QOL 得分变化的 53%、身体活动变化的 28%和自我效能变化的 31%。
尽管疲劳通常被认为是一种需要身体干预的身体问题，但本研究提供了新的证据，表明可能有潜在的干预措施来提高自我效能感，从而可能减轻疲劳对 QOL 的影响。
提高自我效能感的干预措施可能有助于提高该人群的身体活动和生活质量。
