Murphy Susan L, Kratz Anna L, Zynda Aaron J
Susan L. Murphy, ScD, OTR, is Associate Professor, Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, and Research Health Science Specialist, Geriatric Research Education and Clinical Center, VA Ann Arbor Health Care System, Ann Arbor, MI;
Anna L. Kratz, PhD, is Associate Professor, Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor.
Am J Occup Ther. 2019 Jan/Feb;73(1):7301205090p1-7301205090p10. doi: 10.5014/ajot.2019.027748.
Our objective was to evaluate interunit agreement and construct validity of two activity monitors (Actiwatch Score and PRO-Diary) in people with and without spinal cord injury.
Thirty-eight participants (19 with spinal cord injury; 19 age- and sex-matched controls; mean age = 49 yr) wore both monitors and completed tasks during one visit ranging in physical intensity. To compare activity by group and monitor, we conducted t tests. We assessed interunit agreement using intraclass correlations and Bland-Altman plots.
Both monitors demonstrated significantly different increasing physical activity levels with higher intensity tasks. Participants with spinal cord injury had similar activity counts within tasks compared with controls except for walking-wheeling. Agreement was high between monitors across tasks (interclass correlation coefficients = .78-.97).
Both monitors demonstrated good construct validity for measuring physical activity across activities and high agreement. Either monitor is appropriate to examine physical activity patterns in people with spinal cord injury.
我们的目的是评估两种活动监测器（Actiwatch Score和PRO-Diary）在脊髓损伤患者和非脊髓损伤患者中的单位间一致性和结构效度。
38名参与者（19名脊髓损伤患者；19名年龄和性别匹配的对照组；平均年龄 = 49岁）佩戴两种监测器，并在一次就诊期间完成了不同体力强度的任务。为了按组和监测器比较活动情况，我们进行了t检验。我们使用组内相关系数和Bland-Altman图评估单位间一致性。
两种监测器均显示，随着任务强度的增加，身体活动水平有显著差异。除了步行-轮椅活动外，脊髓损伤患者在任务中的活动计数与对照组相似。两种监测器在各项任务中的一致性较高（组间相关系数 = 0.78 - 0.97）。
两种监测器在测量各种活动中的身体活动方面均显示出良好的结构效度和高度一致性。两种监测器均可用于检查脊髓损伤患者的身体活动模式。
