Department of Physical Therapy, University of Michigan-Flint, Flint.
J Cardiopulm Rehabil Prev. 2018 May;38(3):147-158. doi: 10.1097/HCR.0000000000000284.
Reduced physical activity is associated with poor prognosis in chronic obstructive pulmonary disease (COPD). Accelerometers have greatly improved quantification of physical activity by providing information on step counts, body positions, energy expenditure, and magnitude of force. The purpose of this systematic review was to compare the validity and reliability of accelerometers used in patients with COPD.
An electronic database search of MEDLINE and CINAHL was performed. Study quality was assessed with the Strengthening the Reporting of Observational Studies in Epidemiology checklist while methodological quality was assessed using the modified Quality Appraisal Tool for Reliability Studies.
The search yielded 5392 studies; 25 met inclusion criteria. The SenseWear Pro armband reported high criterion validity under controlled conditions (r = 0.75-0.93) and high reliability (ICC = 0.84-0.86) for step counts. The DynaPort MiniMod demonstrated highest concurrent validity for step count using both video and manual methods.
Validity of the SenseWear Pro armband varied between studies especially in free-living conditions, slower walking speeds, and with addition of weights during gait. A high degree of variability was found in the outcomes used and statistical analyses performed between studies, indicating a need for further studies to measure reliability and validity of accelerometers in COPD.
The SenseWear Pro armband is the most commonly used accelerometer in COPD, but measurement properties are limited by gait speed variability and assistive device use. DynaPort MiniMod and Stepwatch accelerometers demonstrated high validity in patients with COPD but lack reliability data.
体力活动减少与慢性阻塞性肺疾病（COPD）的预后不良有关。加速度计通过提供步数、身体姿势、能量消耗和力的大小等信息，极大地提高了体力活动的量化水平。本系统评价的目的是比较用于 COPD 患者的加速度计的有效性和可靠性。
对 MEDLINE 和 CINAHL 进行电子数据库检索。使用强化观察性研究报告流行病学清单评估研究质量，同时使用可靠性研究改良质量评估工具评估方法学质量。
搜索结果产生了 5392 项研究；25 项符合纳入标准。在受控条件下，SenseWear Pro 臂带报告了高的标准相关性（r = 0.75-0.93）和高的可靠性（ICC = 0.84-0.86），用于步数测量。DynaPort MiniMod 在使用视频和手动方法进行步数测量时，表现出最高的同时有效性。
在自由生活条件下、较慢的步行速度下以及在步态中添加重量时，SenseWear Pro 臂带的有效性在研究之间存在差异。研究之间在使用的结果和进行的统计分析方面存在很大的差异，这表明需要进一步的研究来衡量 COPD 患者中加速度计的可靠性和有效性。
SenseWear Pro 臂带是 COPD 中最常用的加速度计，但由于步态速度的可变性和辅助设备的使用，其测量特性受到限制。DynaPort MiniMod 和 Stepwatch 加速度计在 COPD 患者中表现出高的有效性，但缺乏可靠性数据。
