School of Human Kinetics, University of Ottawa, Ottawa, ON, Canada.
Faculty of Kinesiology & Physical Education, University of Toronto, Toronto, ON, Canada.
Ann Epidemiol. 2014 Nov;24(11):837-42. doi: 10.1016/j.annepidem.2014.07.004. Epub 2014 Jul 29.
In this study, we aimed to identify trajectories of physical activity in a cohort of women over a 1-year period after treatment for breast cancer. We also examined factors that could predict trajectory group membership.
We collected data from 199 women using questionnaires at baseline (mean = 3.46 months after treatment), and 3, 6, 9, and 12 months thereafter.
Based on semiparametric group-based modeling, there were five trajectories: consistently inactive, decreasing levels, inactive with increasing levels, somewhat active, and consistently sufficiently active. Based on logistic regression analysis, women who reported higher levels of depressive symptoms and fatigue were less likely to remain consistently sufficiently active, and women who reported higher levels of cancer worry were more likely to remain consistently sufficiently active. Age, stage of cancer, time since treatment, number of treatment types received, and number of physical symptoms did not predict trajectory group membership.
Women do not have uniform physical activity trajectories after treatment for breast cancer. Identification subgroups of women who do not remain consistently sufficiently active, and factors that predict these trajectories, can aid in the development of targeted behavior change interventions.
本研究旨在确定乳腺癌治疗后一年内女性的体力活动轨迹，并探讨可预测轨迹组别的因素。
我们通过问卷收集了 199 名女性的数据，基线时（治疗后平均 3.46 个月）以及随后的 3、6、9 和 12 个月进行了测量。
基于半参数基于组的建模，存在五种轨迹：持续不活跃、逐渐减少、不活跃但逐渐增加、有些活跃和持续足够活跃。基于逻辑回归分析，报告较高水平抑郁症状和疲劳的女性不太可能持续保持足够活跃，而报告较高水平癌症担忧的女性更可能持续保持足够活跃。年龄、癌症分期、治疗时间、接受的治疗类型数量和身体症状数量均不能预测轨迹组别的归属。
乳腺癌治疗后女性的体力活动轨迹并不一致。确定那些不能持续保持足够活跃的女性亚组以及预测这些轨迹的因素，可以帮助制定有针对性的行为改变干预措施。
