Lynch Brigid M, Boyle Terry, Winkler Elisabeth, Occleston Jessica, Courneya Kerry S, Vallance Jeff K
Cancer Epidemiology Centre, Cancer Council Victoria, 615 St Kilda Road, Melbourne, VIC, 3004, Australia.
Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia.
Cancer Causes Control. 2016 Jan;27(1):59-68. doi: 10.1007/s10552-015-0683-4. Epub 2015 Oct 30.
Understanding of the physical activity and sedentary behavior of cancer survivors is limited by reliance on self-reported data. Here, we report the correlates, and patterns of accumulation, of physical activity (light, and moderate-vigorous; MVPA) and sedentary behavior, in colon cancer survivors, using accelerometer-based assessments.
Colon cancer survivors from Alberta, Canada (n = 92), and Western Australia (n = 93) (overall response rate = 21 %) wore an Actigraph(®) GT3X+ accelerometer for seven consecutive days and completed a questionnaire in 2012-2013. Accelerometer data (60 s epochs) were summarized using Freedson activity cutpoints and were adjusted for wear time. Linear regression analyses, conducted 2014-2015, examined correlates for different intensities of activity.
Younger age, being employed, higher family income, and lower BMI were significantly correlated with MVPA, while gender, educational attainment, and BMI were correlated with light-intensity physical activity. Gender, comorbidities, and BMI were correlated with sedentary time. MVPA did not vary by day of the week, whereas the remaining time (as a sedentary/light ratio) showed significant variation, with Saturdays being less sedentary than average [corrected]. When considering time of day, we found that evenings were when the likelihood of both MVPA and sedentary time was highest.
The low level of MVPA and high volume of sedentary time demonstrated by these objective data highlight the need for intervention in colon cancer survivors. The correlates and accumulation patterns described by this study may better inform interventions and translational research designed to increase physical activity and reduce sedentary behavior in colon cancer survivors.
对癌症幸存者身体活动和久坐行为的了解因依赖自我报告数据而受到限制。在此，我们使用基于加速度计的评估方法，报告结肠癌幸存者身体活动（轻度和中度至剧烈；MVPA）和久坐行为的相关因素及累积模式。
来自加拿大艾伯塔省（n = 92）和西澳大利亚州（n = 93）的结肠癌幸存者（总体回复率 = 21%）连续七天佩戴Actigraph(®) GT3X +加速度计，并于2012 - 2013年完成一份问卷。加速度计数据（60秒时间段）使用弗里德森活动切点进行汇总，并根据佩戴时间进行调整。在2014 - 2015年进行的线性回归分析中，研究了不同强度活动的相关因素。
较年轻的年龄、就业、较高的家庭收入和较低的体重指数与中度至剧烈身体活动显著相关，而性别、教育程度和体重指数与轻度身体活动相关。性别、合并症和体重指数与久坐时间相关。中度至剧烈身体活动在一周中的各天没有差异，而其余时间（以久坐/轻度活动比例表示）显示出显著差异，周六的久坐时间低于平均水平[校正后]。考虑一天中的时间时，我们发现晚上是中度至剧烈身体活动和久坐时间可能性最高的时候。
这些客观数据显示的中度至剧烈身体活动水平低和久坐时间长突出了对结肠癌幸存者进行干预的必要性。本研究描述的相关因素和累积模式可能为旨在增加结肠癌幸存者身体活动和减少久坐行为的干预措施及转化研究提供更好的信息。
