Tinlin Louise, Fini Natalie, Bernhardt Julie, Lewis Lucy K, Olds Tim, English Coralie
School of Health Sciences.
School of Health Sciences, the University of Melbourne.
Int J Rehabil Res. 2018 Mar;41(1):14-19. doi: 10.1097/MRR.0000000000000253.
The aim of this study was to investigate the phenomenon of activity (increased activity in response to monitor wear) and determine the minimum wear time of accelerometers when objectively measuring habitual physical activity levels of community dwelling stroke survivors. Exploratory, secondary analyses of cross-sectional data were carried out. Physical activity variables [sitting, standing and stepping time, step count, light physical activity and moderate-to-vigorous physical activity (MVPA)] were measured with two activity monitors for 7 days. Repeated-measures analysis of variance was used to assess reactivity. Minimum wear time was assessed using regression analyses and median absolute differences. Paired t-tests were used to assess differences between weekend and weekday activity levels. There was no evidence of reactivity. Minimum wear time was 3 days for all activity variables, with the exception of MVPA, for which 7 days of monitoring was required. There were no significant differences in weekend and weekday activity levels. To accurately measure activity levels of individuals with stroke, we recommend 3 days of monitoring for all activity variables, with the exception of MVPA, which requires 7 days.
本研究的目的是调查活动现象（因佩戴监测器而活动增加），并确定在客观测量社区中风幸存者的习惯性身体活动水平时加速度计的最短佩戴时间。对横断面数据进行了探索性的二次分析。使用两个活动监测器测量身体活动变量[坐姿、站姿和步行时间、步数、轻度身体活动和中度至剧烈身体活动（MVPA）]，持续7天。采用重复测量方差分析来评估反应性。使用回归分析和中位数绝对差来评估最短佩戴时间。配对t检验用于评估周末和工作日活动水平之间的差异。没有反应性的证据。除MVPA需要7天监测外，所有活动变量的最短佩戴时间均为3天。周末和工作日的活动水平没有显著差异。为了准确测量中风患者的活动水平，我们建议除MVPA需要7天监测外，所有活动变量均监测3天。
