Respiratory Medicine, West Park Healthcare Centre, Toronto, Canada.
Thorax. 2010 Jun;65(6):486-91. doi: 10.1136/thx.2009.128702.
The SenseWear armband (SAB) is designed to measure energy expenditure (EE). In people with chronic obstructive pulmonary disease (COPD), EE estimated using the SAB (EE(SAB)) is a popular outcome measure. However, a detailed analysis of the measurement properties of the SAB in COPD is lacking.
To examine the sensitivity of EE(SAB), agreement between EE(SAB) and EE measured via indirect calorimetry (EE(IC)), and its repeatability in COPD.
26 people with COPD (forced expiratory volume in 1 s (FEV(1))=49+/-18% predicted; 15 males) spent 6 min in five standardised tasks that comprised supine, sitting, standing and two walking speeds. A subgroup (n=12) walked using a rollator. Throughout each task, measurements of EE(SAB) and EE(IC) were collected. The protocol was repeated on a second day.
EE(SAB) increased between standing and slow walking (2.4, metabolic equivalents (METs) 95% CI 2.2 to 2.7) as well as slow and fast walking (0.5 METs, 95% CI 0.3 to 0.7). Considering all tasks together, the difference between EE(SAB) and EE(IC) was -0.2 METs (p=0.21) with a limit of agreement of 1.3 METs. The difference between days in EE(SAB) was 0.0 METs with a coefficient of repeatability of 0.4 METs. Rollator use increased the variability in EE(SAB), compromising its repeatability and agreement with EE(IC).
EE(SAB) was sensitive to small but important changes. There was fair agreement between EE(SAB) and EE(IC), and measurements of EE(SAB) were repeatable. These observations suggest that the SAB is useful for the evaluation of EE in patients with COPD who walk without a rollator.
SenseWear 臂带（SAB）旨在测量能量消耗（EE）。在患有慢性阻塞性肺疾病（COPD）的人群中，使用 SAB 估计的 EE（EE（SAB））是一种常用的结局测量指标。然而，SAB 在 COPD 中的测量特性的详细分析尚缺乏。
检测 EE（SAB）的灵敏度、EE（SAB）与间接测热法（EE（IC））测量的 EE 之间的一致性，以及其在 COPD 中的可重复性。
26 名 COPD 患者（FEV1=49+/-18%预计值；15 名男性）在 6 分钟内完成了 5 项标准任务，包括仰卧位、坐位、站立位和两种步行速度。一个亚组（n=12）使用助行器行走。在每项任务中，均同时采集 EE（SAB）和 EE（IC）的测量值。第二天重复该方案。
与站立位相比，在慢步行走时 EE（SAB）增加了 2.4MET（95%CI 2.2 至 2.7），在慢步行走和快步行走时增加了 0.5MET（95%CI 0.3 至 0.7）。考虑到所有任务，EE（SAB）与 EE（IC）之间的差异为-0.2MET（p=0.21），一致性界限为 1.3MET。EE（SAB）在两天间的差异为 0.0MET，可重复性系数为 0.4MET。助行器的使用增加了 EE（SAB）的变异性，降低了其与 EE（IC）的一致性和可重复性。
EE（SAB）对较小但重要的变化敏感。EE（SAB）与 EE（IC）之间具有良好的一致性，且 EE（SAB）的测量具有可重复性。这些观察结果表明，在不使用助行器行走的 COPD 患者中，SAB 可用于评估 EE。
