Cox Matthew, Carmack Cindy, Hughes Daniel, Baum George, Brown Jubilee, Jhingran Anuja, Lu Karen, Basen-Engquist Karen
Department of Behavioral Science, University of Texas MD Anderson Cancer Center.
Department of Epidemiology and Biostatistics, University of Texas Health Science Center.
Health Psychol. 2015 Oct;34(10):1022-32. doi: 10.1037/hea0000188. Epub 2015 Feb 2.
Research has shown that physical activity (PA) has a positive effect on cancer survivors, including improving quality of life, improving physical fitness, and decreasing risk for cancer recurrence in some cancer types. Theory-based intervention approaches have identified self-efficacy as a potential mediator of PA intervention. This study examines the temporal relationships at 4 time points (T1-T4) between several social-cognitive theory constructs and PA among a group of endometrial cancer survivors receiving PA intervention.
A sample of 98 sedentary women who were at least 6 months posttreatment for endometrial cancer were given interventions to increase their PA. We tested whether modeling, physiological somatic sensations, and social support at previous time points predicted self-efficacy at later time points, which in turn would predict PA at later time points.
Results indicated that, as physiological somatic sensations at T2 decreased, self-efficacy at T3 increased, which led to an increase in PA at T4. This suggests that self-efficacy is a significant mediator between physiological somatic sensations and PA. Exploratory follow-up models suggest that model fit can be improved with the addition of contemporaneous effects between self-efficacy and PA at T3 and T4, changing the timing of the mediational relationships.
Physiological somatic sensations appear to be an important construct to target to increase PA in this population. Self-efficacy appeared to mediate the relationship between physiological somatic sensations and PA, but the timing of this relationship requires further study. (PsycINFO Database Record
研究表明，身体活动（PA）对癌症幸存者有积极影响，包括改善生活质量、提高身体素质以及降低某些癌症类型的癌症复发风险。基于理论的干预方法已将自我效能确定为PA干预的潜在中介因素。本研究考察了一组接受PA干预的子宫内膜癌幸存者在4个时间点（T1 - T4）上几种社会认知理论构念与PA之间的时间关系。
对98名子宫内膜癌治疗后至少6个月久坐不动的女性进行样本研究，并给予增加其PA的干预措施。我们测试了先前时间点的榜样作用、生理躯体感觉和社会支持是否能预测后续时间点的自我效能，而自我效能反过来又能预测后续时间点的PA。
结果表明，随着T2时生理躯体感觉的降低，T3时的自我效能增加，这导致T4时的PA增加。这表明自我效能是生理躯体感觉和PA之间的重要中介因素。探索性后续模型表明，通过增加T3和T4时自我效能与PA之间的同期效应，可以改善模型拟合度，从而改变中介关系的时间顺序。
生理躯体感觉似乎是增加该人群PA的一个重要目标构念。自我效能似乎介导了生理躯体感觉与PA之间的关系，但这种关系的时间顺序需要进一步研究。（PsycINFO数据库记录）
