Department of Physical Therapy for Musculoskeletal Disorders and Surgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt.
Department of Basic Science, Faculty of Physical Therapy, Cairo University, Cairo, Egypt; Department of Basic Science, Faculty of Physical Therapy, Ahram Canadian University, 6th of October City, Egypt.
Knee. 2021 Mar;29:313-322. doi: 10.1016/j.knee.2021.02.012. Epub 2021 Mar 5.
Quantifying proprioception deficit in patients with osteoarthritis (OA) may be important in evaluating treatment effectiveness. This study investigated the concurrent and known-groups validity as well as test-retest reliability of a smartphone application in assessing joint position sense (JPS) in asymptomatic individuals and patients with knee OA.
Sixty-four knees, from 16 asymptomatic controls and 16 patients with bilateral OA, were assessed twice with a 1-week interval in between. The smartphone Goniometer Pro application and isokinetic dynamometer simultaneously quantified JPS, in terms of absolute repositioning error (RE) angle, during active and passive limb movements at selected angles.
Both devices showed moderate to almost perfect correlations in measuring JPS; whether active (intra-class correlation coefficient (ICC) >0.87) or passive (ICC >0.97). The mean RE angle differences between the two devices were <0.77° (passive JPS) and <2.76° (active JPS). Both devices were capable of distinguishing patients and asymptomatic controls at 55° and 80°. The smartphone showed moderate test-retest reliability of active JPS measurement (ICC = 0.51) in the two groups, similar to that of the isokinetic dynamometer (ICC = 0.62), but with a high measurement error.
Smartphone application is a valid alternative to the isokinetic dynamometer in assessing JPS in patients with knee OA and asymptomatic controls. The two devices could distinguish patients and asymptomatic volunteers during passive JPS measured at 55° and 80°. Both devices have moderate reliability in quantifying active JPS, but reliability results should be considered with caution.
量化骨关节炎（OA）患者的本体感觉缺陷对于评估治疗效果可能很重要。本研究旨在探讨智能手机应用在评估无症状个体和膝骨关节炎患者关节位置觉（JPS）方面的同时效度、已知组效度和重测信度。
使用智能手机 Goniometer Pro 应用程序和等速测力计，对 16 名无症状对照者和 16 名双侧 OA 患者的 64 个膝关节进行了两次评估，两次评估之间间隔 1 周。在选择的角度下，主动和被动肢体运动过程中，智能手机应用程序和等速测力计同时以绝对重定位误差（RE）角度定量 JPS。
两种设备在测量 JPS 时均显示出中度至几乎完美的相关性；无论是主动（组内相关系数（ICC）>0.87）还是被动（ICC>0.97）。两种设备之间的平均 RE 角度差异<0.77°（被动 JPS）和<2.76°（主动 JPS）。两种设备都能够在 55°和 80°区分患者和无症状对照组。智能手机在两组中的主动 JPS 测量具有中度重测信度（ICC=0.51），与等速测力计相似（ICC=0.62），但测量误差较高。
智能手机应用程序是评估膝骨关节炎患者和无症状对照组 JPS 的等速测力计的有效替代方法。两种设备都可以在 55°和 80°测量的被动 JPS 中区分患者和无症状志愿者。两种设备在定量主动 JPS 方面均具有中度可靠性，但应谨慎考虑可靠性结果。
