Department of Orthopaedics, University Medical Center Groningen, The Netherlands.
Am J Phys Med Rehabil. 2011 Aug;90(8):681-7. doi: 10.1097/PHM.0b013e31820f955e.
This study examined the accuracy and reproducibility of a body-fixed sensor-based assessment for quantifying frontal plane angular movements of the (upper) thorax and pelvis of patients with hip osteoarthritis at different walking speeds. To evaluate accuracy, the angular movements of sensors attached to the thorax and pelvis of three patients were compared with results based on an optical motion analysis system. Accuracy was high, with small and consistent mean differences (<1.0 degree) and corresponding standard deviations (<1.3 degrees) between optical motion analysis system and body-fixed sensor data. To evaluate reproducibility, angular trunk movements were assessed twice in 15 patients. Reproducibility was high (intraclass correlation coefficients ranged from 0.86 to 0.97), and the values of the mean differences between the test and retest were small, with the 95% confidence interval containing zero. This body-fixed sensor-based assessment is an accurate and reproducible method for quantifying frontal plane compensatory trunk movements during gait of patients with hip osteoarthritis at different walking speeds.
本研究旨在评估一种基于体固式传感器的评估方法，用于定量测量髋关节炎患者在不同步行速度下的胸和骨盆额状面角度运动的准确性和可重复性。为了评估准确性，将三个患者的胸和骨盆上的传感器的角度运动与基于光学运动分析系统的结果进行比较。准确性较高，光学运动分析系统和体固式传感器数据之间的平均差异较小且一致（<1.0 度），对应的标准差也较小（<1.3 度）。为了评估可重复性，对 15 名患者的角度躯干运动进行了两次评估。可重复性较高（组内相关系数范围为 0.86 至 0.97），两次测试之间的平均差异值较小，95%置信区间包含零。这种基于体固式传感器的评估方法是一种准确且可重复的方法，可用于定量测量髋关节炎患者在不同步行速度下行走时的额状面代偿性躯干运动。
