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Reliability applicability of single-trial grip and key pinch strength measurements Masaki Kurosaki 1,2 , Kimito Momose 3 1Department of Occupational Therapy, Health Science University 2Department of Health Sciences, Graduate School of Medicine, Shinshu University 3Department of Physical Therapy, School of Health Sciences, Shinshu University Keyword: 握力 , ピンチ力 , 筋力評価 , 信頼性 , Grip strength , Pinch strength , Strength measurement , Reliability pp.529-536
Published Date 2018/10/15
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 This study attempts to verify the reliability of single-trial measurements of grip and key pinch strength and show how resulting data should be used to infer when meaningful changes have occurred in a subject. Data for the study were collected from 40 male and 40 female, healthy university students over 20 years old and were divided according to both the subjects' gender and each of the hands. Results were favorable for both measurements, with no significant difference between the first day of measurement and the second. There was a range of reliability Intraclass correlation coefficients (ICC) (1, 1) of 0.80-0.93, and no system errors. When considered from the standpoint of time and burden placed on the subjects and testers, the merits of a single-trial method compared to a three-trial method are even greater. The Minimal Detectable Change 95 (MDC 95) ranged from 13.5-18.9%. Therefore, when inferring the change (improvement or worsening) in a subject, 20% should be a statistically useful rough value to bear in mind.


Copyright © 2018, Japanese Association of Occupational Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 0289-4920 日本作業療法士協会

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