Kimura Masanobu, Ogata Yuto, Akebi Toru, Ochi Mitsuhiro, Hachisuka Kenji, Saeki Satoru
University Hospital of Occupational and Environmental Health, Kitakyushu, Japan.
Wakamatsu Hospital of the University of Occupational and Environmental Health, Kitakyushu, Japan.
J Rehabil Assist Technol Eng. 2018 Nov 18;5:2055668318802558. doi: 10.1177/2055668318802558. eCollection 2018 Jan-Dec.
Ankle dorsiflexor muscle strength is a crucial component of gait.
We describe the development of a simple, hand-held dynamometer to measure the ankle dorsiflexor muscle strength in the sitting position. In addition, we examine its intra- and inter-rater reliability.
Measurements of the peak ankle dorsiflexor muscle strength were obtained by two examiners for 30 ankles of 15 healthy adults at two time points, with a one-day interval between measurements, to determine the inter- and intra-rater reliability. The intraclass correlation coefficients were calculated, and an intraclass correlation coefficient > 0.90 was considered as excellent reliability. A Bland-Altman analysis was used to assess systemic bias. The minimal detectable change in muscle strength was calculated with a confidence level of 95% (MDC).
The reliability of the device was excellent for both intra- (intraclass correlation coefficients [1,3] = 0.94) and inter-rater (intraclass correlation coefficients [2,3] = 0.96) comparisons. No fixed or proportional bias was observed between the two examiners. The MDC was 0.77 N/kg.
Our results indicate the excellent reliability and responsiveness of our device. By obtaining the measurements of dorsiflexor strength while sitting, compensatory motions are suppressed, yielding a more consistent measurement that can be reliably used to detect subtle changes in the ankle dorsiflexor muscle strength.
踝关节背屈肌力量是步态的关键组成部分。
我们描述了一种简单的手持测力计的开发,用于测量坐姿下的踝关节背屈肌力量。此外,我们还检验了其评分者内和评分者间的可靠性。
由两名检查者在两个时间点对15名健康成年人的30个踝关节进行踝关节背屈肌峰值力量测量,测量间隔为一天,以确定评分者间和评分者内的可靠性。计算组内相关系数,组内相关系数>0.90被认为具有极好的可靠性。采用Bland-Altman分析评估系统偏差。计算肌肉力量的最小可检测变化,置信水平为95%(MDC)。
该设备在评分者内(组内相关系数[1,3]=0.94)和评分者间(组内相关系数[2,3]=0.96)比较中可靠性均极佳。两名检查者之间未观察到固定或比例偏差。MDC为0.77N/kg。
我们的结果表明我们的设备具有极好的可靠性和反应性。通过在坐姿下获得背屈肌力量的测量值,可抑制代偿性运动,从而产生更一致的测量结果,可可靠地用于检测踝关节背屈肌力量的细微变化。