Marks R, Quinney A H
Department of Physical Therapy, University of Alberta, Edmonton, Canada.
J Rheumatol. 1993 Nov;20(11):1919-24.
We examined the test-retest reliability and the construct validity of the measurement of knee position sense for describing the functional weightbearing performance of women with osteoarthritis (OA) of the knee.
For the purpose of this study, position sense was defined as the error occurring when subjects attempted to reproduce a criterion angle in standing with visual cues eliminated. Five such tests were recorded photographically on 3 different occasions. On each occasion the 10 subjects also completed a self-paced walking test over a 13 m indoor walkway.
The photographic measurements were reproducible (r = 0.90) and there was no change in positioning accuracy across sessions. There was a significant (p < 0.05) inverse correlation of 0.70 between the standard deviation of the mean individual measurements of position sense (precision of the test) and those of walking speed.
Our study demonstrates good measurement reliability and a comparable mean angular error with repeated tests. It also suggests the amplitude of the variability of this error is a strong determinant of an individual OA patient's functional performance in walking.
我们检验了膝关节位置觉测量的重测信度和结构效度，以描述膝骨关节炎（OA）女性的功能性负重表现。
在本研究中，位置觉定义为受试者在消除视觉线索的情况下站立时试图重现标准角度时出现的误差。在3个不同场合对5次这样的测试进行了拍照记录。每次，10名受试者还在一条13米长的室内通道上完成了一次自定步速的步行测试。
摄影测量结果具有可重复性（r = 0.90），各次测试的定位准确性没有变化。位置觉平均个体测量值的标准差（测试精度）与步行速度的标准差之间存在显著（p < 0.05）的负相关，相关系数为0.70。
我们的研究表明测量具有良好的可靠性，重复测试时平均角度误差相当。这也表明该误差变异性的幅度是个体OA患者步行功能表现的一个重要决定因素。
