Department of Kinesiology, Neag School of Education, University of Connecticut, Storrs, CT 06269, USA.
J Geriatr Phys Ther. 2012 Apr-Jun;35(2):79-81. doi: 10.1519/JPT.0b013e3182239f64.
The measurement properties of handheld dynamometry (HHD) have been studied extensively, but information about the responsiveness of the procedure is scant. The purpose of this study, therefore, was to determine the responsiveness (minimal detectable change [MDC]) for measurements of knee extension force obtained by HHD from older adult patients in 2 different settings.
This study involved the retrospective retrieval of knee extension force data of the left and right sides from 2 sources (acute rehabilitation [n = 53] and home care [n = 46]). The standard deviation of the forces and the weighted mean intraclass correlation coefficient (ICC) from 3 previous studies (ICC = 0.90) were then used to calculate the MDC95%.
The MDC95% ranged from 46.0 to 79.0 N. It was lower for patients measured in a home care setting than for those measured in an acute rehabilitation setting.
By describing the MDC for knee extension force obtained by HHD from older adults in 2 settings, this study provides an indication of the changes in force that would have to be surpassed to conclude that a real change in knee extension strength was observed. The MDCs reported have a role in the interpretation of repeated measurements and in setting goals for changes in knee extension force.
手持式测力计（HHD）的测量性能已得到广泛研究，但有关该程序反应性的信息却很少。因此，本研究的目的是确定在两种不同环境下使用 HHD 测量老年患者膝关节伸展力时的反应性（最小可检测变化[MDC]）。
本研究回顾性地从两个来源（急性康复[n=53]和家庭护理[n=46]）检索了膝关节伸展力的数据。然后，使用之前三项研究的力标准差和加权均数组内相关系数（ICC=0.90）来计算 MDC95%。
MDC95%的范围为 46.0 至 79.0 N。在家庭护理环境中测量的患者的 MDC95%低于在急性康复环境中测量的患者。
通过描述在两种环境下使用 HHD 从老年人获得的膝关节伸展力的 MDC，本研究提供了一个关于力变化的指示，该变化必须超过才能得出膝关节伸展强度有实际变化的结论。报告的 MDC 可用于解释重复测量并为膝关节伸展力的变化设定目标。
