膝踝等长测力及康复训练评估系统的信效度研究

关键词：下肢  等长肌力评定  测力仪  信度  效度

Keywords:lower limb  isometric strength assessment  dynamometer  reliability  validity

摘要：

      摘要 目的：检验膝踝等长测力及康复训练评估系统测定下肢肌肉力量的信度与效度。 方法：同一测试者使用膝踝等长测力及康复训练评估系统对40名大学生进行间隔时间1周以上的2次最大等长肌肉力量测试。计算组内相关系数（ICC）、测量标准误（SEM）和最小真正改变量（MDC）评价信度。膝踝等长测力及康复训练评估系统测试结果与膝踝关节不同力臂位置的不同外部负荷效标值进行Pearson相关分析和配对样本t检验评价效度。 结果：不同角度膝踝关节屈伸等长肌力ICC=0.97—0.99（P<0.01）；SEM=1.74—11.09Nm，SEM%=6.05%—13.78%，MDC=4.82—30.73Nm，MDC%=16.76%—38.20%。膝踝等长测力及康复训练评估系统显示值与外部负荷效标值高度正相关（r=0.99—1.00，P<0.01），且均不存在显著性差异（P>0.05）。 结论：膝踝等长测力及康复训练评估系统具有良好的信效度，可便捷有效地测量多角度膝踝关节肌肉力量，并实时显示。

Abstract:

      Abstract Objective： To investigate the reliability and validity of the knee-ankle isometric strength measurement and rehabilitation training evaluation system for measuring lower limb muscle strength. Method： The same tester used the above-mentioned system to perform two maximum isometric muscle strength tests on 40 college students at an interval of one week. The intraclass correlation coefficient （ICC）， standard error of measurement （SEM） and minimum true change （MDC） were calculated to evaluate the reliability. Pearson correlation analysis and paired sample t test were used to evaluate the validity of the test results and the external load criterion data. Result： The ICC of test-retest were 0.97—0.99 （P<0.01）， SEM were 1.74—11.09Nm， SEM% were 6.05%—13.78%， MDC were 4.82—30.73 Nm， MDC% were 16.76%—38.20%. The test results were highly positively correlated with the external load criterion data （r=0.99—1.00， P<0.01）， and there was no significant difference （P>0.05）. Conclusion： The knee-ankle isometric strength measurement and rehabilitation training evaluation system has good reliability and validity， and can conveniently and effectively measure the multi-angle knee and ankle muscle strength and display it in real time.