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Test-retest reliability and variability of knee adduction moment peak, impulse and loading rate during walking.
Gait & Posture ( IF 2.2 ) Pub Date : 2020-05-23 , DOI: 10.1016/j.gaitpost.2020.05.029
Hong Han Tan 1 , Benjamin Mentiplay 2 , Joshua Jia-En Quek 3 , Asher Chi Weng Tham 3 , Leon Zhi Xia Lim 3 , Ross Allan Clark 4 , Ee Lin Woon 1 , Ting Ting Yeh 3 , Celia Ia Choo Tan 5 , Yong-Hao Pua 1
Affiliation  

Background

Previous studies have reported good test-retest reliability for peak knee adduction moment (KAM) during walking. However, reliability of other KAM measurements has not been established.

Research question

What is the test-retest reliability of peak KAM, KAM impulse, and KAM loading rate measurements during walking in knee-healthy individuals?

Methods

Data from 32 knee-healthy participants were analysed in this test-retest reliability study. Various KAM measurements were reported for two sessions with kinematic and kinetic data obtained from a motion capture system synchronised with force plates, with a median of 1 week between sessions.

Results

For all KAM measures, intra-class correlation coefficients were above 0.90 and their lower bound 95 % confidence limits exceeded 0.81. However, absolute measurement variability differed across measures, with normalized SEM (8 %–15 %), normalized MDC95 (20 %–40 %), intra-session MAD (10 %–18 %), and inter-session MAD (12 %–22 %) varying over a 2-fold range. Overall and first peak KAM, KAM impulse over 50 % stance, and KAM loading rate (15 frame window) showed ≤10 % and ≤15 % intra- and inter-session MAD, respectively.

Significance

This study provided previously undefined test-retest reliability estimates for various KAM measures during walking. Researchers and clinicians should not assume that the various aspects of the KAM curve share similar reliability.



中文翻译:

步行过程中膝盖内收力矩峰值,冲动和负荷率的重测信度和变异性。

背景

先前的研究报告了步行过程中峰值膝关节内收力矩(KAM)的良好重测信度。但是,尚未确定其他KAM测量的可靠性。

研究问题

膝盖健康个体在行走过程中峰值KAM,KAM冲量和KAM负荷率测量的重测可靠性如何?

方法

在此测试-再测试可靠性研究中,分析了来自32位膝盖健康参与者的数据。报告了两次会议的各种KAM测量结果,以及从与力板同步的运动捕捉系统获得的运动学和动力学数据,两次会议之间的中位数为1周。

结果

对于所有KAM度量,类内相关系数均高于0.90,其下限95%置信度上限超过0.81。但是,不同测量的绝对测量差异是不同的,标准化的SEM(8%–15%),标准化的MDC 95(20%–40%),会话内MAD(10%–18%)和会话间MAD(12 %–22%)在2倍范围内变化。KAM的总体峰值和第一个峰值,超过50%的姿态的KAM脉冲以及KAM加载速率(15帧窗口)分别表示会话期间和会话间MAD≤10%和≤15%。

意义

这项研究为步行过程中的各种KAM措施提供了以前不确定的重测可靠性估计。研究人员和临床医生不应假设KAM曲线的各个方面具有相似的可靠性。

更新日期:2020-05-23
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