Courneya Kerry S, Friedenreich Christine M, Sela Rami A, Quinney H Arthur, Rhodes Ryan E
Faculty of Physical Education, University of Alberta, Edmonton, Canada.
Ann Behav Med. 2002 Fall;24(4):257-68. doi: 10.1207/S15324796ABM2404_02.
In this study, we examined correlates of adherence and contamination in a randomized controlled trial (RCT) of exercise in cancer survivors using the theory of planned behavior and the Five Factor Model of personality (FFM). We randomly assigned cancer survivors in group psychotherapy classes to either a waiting-list control group (n = 45) or a home-based, moderate intensity exercise program (n = 51). At baseline, participants completed measures of the theory of planned behavior, the FFM, past exercise, physical fitness, medical variables, and demographics. We then monitored exercise over a 10-week period by weekly self-reports. Hierarchical multiple regression analyses indicated that the independent predictors of overall RCT exercise across both conditions were past exercise (beta = .36, p < .001), assignment to experimental condition (beta = .34, p < .001), sex (beta = .30, p < .001), and intention (beta = .14, p < .10). For exercise adherence in the exercise condition, the independent predictors were sex (beta = .38, p < .01), extraversion (beta = .30, p < .05), normative beliefs (beta = -.27, p < .05), and perceived behavioral control (beta = .23, p < .10). Finally, the independent predictors of exercise contamination in the control condition were past exercise (beta = .70, p < .001), sex (beta = .20, p < .05), and intention (beta = .17, p < .10). We conclude that the correlates of exercise adherence and contamination differ in kind as well as in degree. Explanations for these findings and practical implications for conducting exercise RCTs in this population are offered.
在本研究中，我们运用计划行为理论和人格五因素模型（FFM），对癌症幸存者运动随机对照试验（RCT）中的依从性和沾染情况的相关因素进行了研究。我们将参加团体心理治疗课程的癌症幸存者随机分为等待列表对照组（n = 45）或家庭中度强度运动项目组（n = 51）。在基线时，参与者完成了计划行为理论、FFM、既往运动、体能、医学变量和人口统计学的测量。然后，我们通过每周的自我报告在10周内监测运动情况。分层多元回归分析表明，两种情况下RCT总体运动的独立预测因素为既往运动（β = 0.36，p < 0.001）、分配到实验条件（β = 0.34，p < 0.001）、性别（β = 0.30，p < 0.001）和意向（β = 0.14，p < 0.10）。对于运动条件下的运动依从性，独立预测因素为性别（β = 0.38，p < 0.01）、外向性（β = 0.30，p < 0.05）、规范信念（β = -0.27，p < 0.05）和感知行为控制（β = 0.23，p < 0.10）。最后，对照组运动沾染的独立预测因素为既往运动（β = 0.70，p < 0.001）、性别（β = 0.20，p < 0.05）和意向（β = 0.17，p < 0.10）。我们得出结论，运动依从性和沾染的相关因素在种类和程度上均有所不同。本文对这些发现进行了解释，并提出了在该人群中开展运动RCT的实际意义。
