O'Grady Megan, O'Dwyer Tom, Connolly James, Condell Joan, Esquivel Karla Muñoz, O'Shea Finbar D, Gardiner Philip, Wilson Fiona
Discipline of Physiotherapy, Trinity College Dublin, D08 W9RT Dublin, Ireland.
Independent Researcher, D08 W9RT Dublin, Ireland.
Diagnostics (Basel). 2021 Mar 10;11(3):490. doi: 10.3390/diagnostics11030490.
The objectives of this study were to evaluate the reliability of wearable inertial motion unit (IMU) sensors in measuring spinal range of motion under supervised and unsupervised conditions in both laboratory and ambulatory settings. A secondary aim of the study was to evaluate the reliability of composite IMU metrology scores (IMU-ASMI (Amb)). Forty people with axSpA participated in this clinical measurement study. Participant spinal mobility was assessed by conventional metrology (Bath Ankylosing Spondylitis Metrology Index, linear version-BASMI) and by a wireless IMU sensor-based system which measured lumbar flexion-extension, lateral flexion and rotation. Each sensor-based movement test was converted to a normalized index and used to calculate IMU-ASMI (Amb) scores. Test-retest reliability was evaluated using intra-class correlation coefficients (ICC). There was good to excellent agreement for all spinal range of movements (ICC > 0.85) and IMU-ASMI (Amb) scores (ICC > 0.87) across all conditions. Correlations between IMU-ASMI (Amb) scores and conventional metrology were strong (Pearson correlation ≥ 0.85). An IMU sensor-based system is a reliable way of measuring spinal lumbar mobility in axSpA under supervised and unsupervised conditions. While not a replacement for established clinical measures, composite IMU-ASMI (Amb) scores may be reliably used as a proxy measure of spinal mobility.
本研究的目的是评估可穿戴惯性运动单元（IMU）传感器在实验室和动态环境中，在有监督和无监督条件下测量脊柱活动范围的可靠性。该研究的第二个目的是评估复合IMU计量评分（IMU-ASMI（Amb））的可靠性。40名轴向脊柱关节炎（axSpA）患者参与了这项临床测量研究。通过传统计量方法（巴斯强直性脊柱炎计量指数，线性版本-BASMI）和基于无线IMU传感器的系统评估参与者的脊柱活动度，该系统测量腰椎屈伸、侧屈和旋转。每个基于传感器的运动测试都转换为标准化指数，并用于计算IMU-ASMI（Amb）评分。使用组内相关系数（ICC）评估重测可靠性。在所有条件下，所有脊柱活动范围（ICC>0.85）和IMU-ASMI（Amb）评分（ICC>0.87）都有良好到极好的一致性。IMU-ASMI（Amb）评分与传统计量方法之间的相关性很强（Pearson相关性≥0.85）。基于IMU传感器的系统是在有监督和无监督条件下测量axSpA患者腰椎活动度的可靠方法。虽然不能替代既定的临床测量方法，但复合IMU-ASMI（Amb）评分可可靠地用作脊柱活动度的替代测量指标。
