Intra-rater Reliability of Arm and Hand Muscle Strength Measurements in Persons With Late Effects of Polio
Intra-rater Reliability of Arm and Hand Muscle Strength Measurements in Persons With Late Effects of Polio
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DOI：
10.1016/j.pmrj.2015.03.016
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发表时间：
2015-10-01
期刊：
影响因子：
2.1
通讯作者：
Lexell, Jan
中科院分区：
文献类型：
--
作者：
Brogardh, Christina;Flansbjer, Ulla-Britt;Lexell, Jan
背景：上肢肌无力在脊髓灰质炎晚期效应患者中很常见。为了能够测量肌肉力量并随着时间的推移而变化，需要可靠的测量。目的：评估脊髓灰质炎晚期效应患者等长和等速手臂和手部肌肉力量测量的评估者内可靠性。设计：重测设计。设置：大学医院门诊。参与者：28人（平均年龄68岁，SD 11岁）与脊髓灰质炎在他们的上肢。方法：等距肩外展，等速同心屈肘和伸展，等长屈肘，等长握力测量两次，相隔14天。用组内相关系数、测试时段之间的平均差异（（d）超过标准条）以及（d）超过标准条的95%置信区间（测量的标准误）来评估可靠性（SEM和SEM%），最小真实的差异（SRD和SRD%）和Bland-Altman图。主要结果测量：使用固定式测力计（Biodex）测量手臂力量，使用电子测力计（GRIP-it）测量握力。评价者内信度较高，类内相关系数在0.87和0.98之间。结果表明：脊髓灰质炎患者上肢肌力的变化范围为20%~ 67%，其中以SEM%变化最小，变化范围为7%~ 24%，SRD%变化最小。然而，测量误差表明，该方法更适合于检测一组人的肌肉力量的变化，而不是个人。
Background: Muscle weakness in the upper limb is common in persons with late effects of polio. To be able to measure muscle strength and follow changes over time, reliable measurements are needed.Objective: To evaluate the intra-rater reliability of isometric and isokinetic arm and hand muscle strength measurements in persons with late effects of polio.Design: A test-retest design.Settings: A university hospital outpatient clinic.Participants: Twenty-eight persons (mean age 68 years, SD 11 years) with late effects of polio in their upper limbs.Methods: Isometric shoulder abduction, isokinetic concentric elbow flexion and extension, isometric elbow flexion, and isometric grip strength were measured twice, 14 days apart. Reliability was evaluated with the intra-class correlation coefficient, the mean difference between the test sessions ((d) over bar), together with the 95% confidence intervals for (d) over bar, the standard error of measurement (SEM and SEM%), the smallest real difference (SRD and SRD%), and Bland-Altman graphs.Main Outcome Measurements: A fixed dynamometer (Biodex) was used to measure arm strength and an electronic dynamometer (GRIP-it) was used to measure grip strength.Results: Intra-rater reliability was high, with intra-class correlation coefficients between 0.87 and 0.98. The SEM%, representing the smallest change for a group of persons, ranged from 7%-24% for all strength measurements, and the SRD%, representing the smallest change for an individual person, ranged from 20%-67%.Conclusion: Muscle strength in the upper limbs can be reliably measured in persons with late effects of polio. However, the measurement errors indicate that the method is more suitable to detect changes in muscle strength for a group of persons than for an individual person.