Human Performance Lab, Schulthess Clinic, Zurich, Switzerland; Zurich University of Applied Sciences (ZHAW), Winterthur, Switzerland.
Human Performance Lab, Schulthess Clinic, Zurich, Switzerland; Institute for Biomechanics, ETH, Zurich, Switzerland.
Gait Posture. 2020 Jul;80:77-79. doi: 10.1016/j.gaitpost.2020.04.002. Epub 2020 May 31.
Instrumented treadmills are potentially useful tools for the assessment of gait parameters in orthopaedic clinical settings, but their measurement properties remain uncertain.
What is the discriminant validity and reproducibility of spatiotemporal and kinetic gait parameters measured by a pressure-instrumented treadmill at different speeds and inclinations in patients with knee osteoarthritis (KOA)?
A total of 54 patients with unilateral KOA and 23 healthy controls took part in the study. Step length, single-limb support duration and ground reaction force were recorded during level and uphill walking at 3 and 4 km/h using a commercially-available treadmill instrumented with an integrated pressure platform. We examined discriminant validity (difference between involved and uninvolved side as well as against healthy controls) and test-retest reproducibility (reliability and agreement).
Significant side differences were observed for single-limb support duration and ground reaction force at touchdown in all conditions (P < 0.05). All the investigated gait parameters showed acceptable reliability and agreement, except step length at 4 km/h uphill.
We conclude that the pressure-instrumented treadmill used in this study may have good clinical utility for quantitative gait analysis in patients with KOA under different experimental conditions.
在矫形临床环境中，仪器化跑步机可能是评估步态参数的有用工具，但它们的测量特性仍不确定。
在膝骨关节炎（KOA）患者中，不同速度和倾斜度的压力式跑步机测量的时空和动力学步态参数的鉴别效度和可重复性如何？
共有 54 名单侧 KOA 患者和 23 名健康对照者参加了这项研究。在使用集成压力平台的商业跑步机上，在 3 公里/小时和 4 公里/小时的水平和上坡行走时，记录步长、单肢支撑持续时间和地面反作用力。我们检查了鉴别效度（患侧与健侧以及与健康对照组之间的差异）和重测可重复性（可靠性和一致性）。
在所有条件下，单肢支撑持续时间和触地时的地面反作用力都存在显著的侧间差异（P<0.05）。除了 4 公里/小时上坡行走时的步长外，所有研究的步态参数都具有可接受的可靠性和一致性。
我们得出结论，本研究中使用的压力式跑步机在不同实验条件下对 KOA 患者的定量步态分析可能具有良好的临床应用价值。
