Concurrent validity of a trunk tri-axial accelerometer system for gait analysis in older adults
Concurrent validity of a trunk tri-axial accelerometer system for gait analysis in older adults
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DOI：
10.1016/j.gaitpost.2008.11.003
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发表时间：
2009-04-01
期刊：
影响因子：
2.4
通讯作者：
de Bruin, Eling D.
中科院分区：
文献类型：
--
作者：
Hartmann, Antonia;Luzi, Susanna;de Bruin, Eling D.
这项研究的目的是(1)确定躯干三轴加速度计系统(DyaPort(R)(MiniMod))和GAITRite(R)系统在首选、慢速和快速自选步行速度下的时空步态参数的同时有效性，这些参数是记录在老年人的平均和个人步速数据中的；(2)比较不同步行距离的平均步速数据和个人步速数据的一致性水平。在步速、步频、步长和步长(组内相关系数(ICCs)在0.99和1.00之间，RLOA在0.7%和3.3%之间)方面，两个系统之间的一致性水平是很好的，在步长变异性方面是中等的(ICCs在0.88到0.98之间，RLOA在19%到34%之间)，而在步长变异性方面(ICCs在0.24和0.33之间，RLOA在73%和87%之间)。个体步长和步长的一致性水平中等，ICCs在0.81到0.89之间，RLOA在9%到13%之间。比较不同步行距离的平均步数数据和个人步数的RLOA，RLOA随着步数的增加而降低。这项研究的结果表明，可以在真实生活条件下测量的DyaPort(R)(MiniMod)系统是一种高度有效的工具，可以用来评估独立生活老年人在大约20米长的走道上的平均步态数据的时空步态参数。步态可变性测量和个人步态数据需要谨慎看待，因为两个系统之间的一致性处于中等到较低的水平。(C)2008爱思唯尔B.V.保留所有权利。
The aim of this study was (1) to determine the concurrent validity of a trunk tri-axial accelerometer system (DynaPort (R)(MiniMod)) with the GAITRite (R) system for spatio-temporal gait parameters at preferred, slow and fast self-selected walking speed that were recorded for averaged and individual step data in an older adult population and (2) to compare the levels of agreement for averaged step data from different walking distances and individual step data. The levels of agreement between the two systems for averaged step data was excellent for walking speed, cadence, step duration and step length (intraclass correlation coefficients (ICCs) between 0.99 and 1.00, ratios limits of agreement (RLOA) between 0.7% and 3.3%), moderate for variability of step duration (ICCs between 0.88 and 0.98 and RLOAs between 19% and 34%) and low for variability of step length (ICCs between 0.24 and 0.33 and RLOAs between 73% and 87%). The levels of agreement for individual step duration and step length were moderate with ICCs between 0.81 and 0.89 and with RLOAs between 9% and 13%. Comparing RLOAs from averaged step data across the different walking distances and individual step data, the RLOAs decreased with increased number of steps. The results of this study demonstrate that the DynaPort (R)(MiniMod) system, which allows measurements in real life conditions, is a highly valid tool for assessment of spatio-temporal gait parameters for averaged step data across a walkway length of approximately 20 m in independent living elderly. Gait variability measures and individual step data need to be viewed with caution because of the moderate to low levels of agreement between the two systems. (C) 2008 Elsevier B.V. All rights reserved.