Welk Greg, Kim Youngwon, Shook Robin P, Ellingson Laura, Lobelo Roberto L
J Phys Act Health. 2017 Jul;14(7):546-551. doi: 10.1123/jpah.2016-0003. Epub 2017 Mar 14.
The study evaluated the concurrent and criterion validity of a new, disposable activity monitor designed to provide objective data on physical activity and energy expenditure in clinical populations.
A sample of healthy adults (n = 52) wore the disposable Metria IH1 along with the established Sensewear armband (SWA) monitor for a 1-week period. Concurrent validity was examined by evaluating the statistical equivalence of estimates from the Metria and the SWA. Criterion validity was examined by comparing the relative accuracy of the Metria IH1 and the SWA for assessing walking/running. The absolute validity of the 2 monitors was compared by computing correlations and mean absolute percent error (MAPE) relative to criterion data from a portable metabolic analyzer.
The output from 2 monitors was highly correlated (correlations > 0.90) and the summary measures yielded nearly identical allocations of time spent in physical activity and energy expenditure. The monitors yielded statistically equivalent estimates and had similar absolute validity relative to the criterion measure (12% to 15% error).
The disposable nature of the adhesive Metria IH1 monitor offers promise for clinical evaluation of physical activity behavior in patients. Additional research is needed to test utility for counseling and behavior applications.
本研究评估了一种新型一次性活动监测仪的同时效度和效标效度，该监测仪旨在为临床人群的身体活动和能量消耗提供客观数据。
选取52名健康成年人作为样本，佩戴一次性Metria IH1监测仪和已有的Sensewear臂带（SWA）监测仪，为期1周。通过评估Metria和SWA估计值的统计等效性来检验同时效度。通过比较Metria IH1和SWA在评估步行/跑步方面的相对准确性来检验效标效度。通过计算相对于便携式代谢分析仪标准数据的相关性和平均绝对百分比误差（MAPE）来比较这两种监测仪的绝对效度。
两种监测仪的输出高度相关（相关性>0.90），并且汇总测量结果在身体活动和能量消耗所花费时间的分配上几乎相同。这两种监测仪产生了统计等效的估计值，并且相对于标准测量具有相似的绝对效度（误差为12%至15%）。
粘性Metria IH1监测仪的一次性特性为患者身体活动行为的临床评估提供了前景。需要进一步研究以测试其在咨询和行为应用方面的效用。
