Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-4861
Title: Manual muscle testing and hand-held dynamometry in people with inflammatory myopathy : an intra- and interrater reliability and validity study
Authors : Baschung Pfister, Pierrette
de Bruin, Eling D.
Sterkele, Iris
Maurer, Britta
de Bie, Rob A.
Knols, Ruud H.
Published in : PLOS ONE
Volume(Issue) : 13
Issue : 3
Publisher / Ed. Institution : Public Library of Science
Issue Date: 2018
License (according to publishing contract) : CC BY 4.0: Attribution 4.0 International
Type of review: Peer review (Publication)
Language : English
Subjects : Adult; Humans; Isometric Contraction; Muscle Strength; Muscle; Myositis; Reproducibility of Results; Muscle Strength Dynamometer; Skeletal
Subject (DDC) : 615.82: Physical therapy
616.7: Diseases of musculoskeletal system and orthopaedics
Abstract: Manual muscle testing (MMT) and hand-held dynamometry (HHD) are commonly used in people with inflammatory myopathy (IM), but their clinimetric properties have not yet been sufficiently studied. To evaluate the reliability and validity of MMT and HHD, maximum isometric strength was measured in eight muscle groups across three measurement events. To evaluate reliability of HHD, intra-class correlation coefficients (ICC), the standard error of measurements (SEM) and smallest detectable changes (SDC) were calculated. To measure reliability of MMT linear Cohen`s Kappa was computed for single muscle groups and ICC for total score. Additionally, correlations between MMT8 and HHD were evaluated with Spearman Correlation Coefficients. Fifty people with myositis (56±14 years, 76% female) were included in the study. Intra-and interrater reliability of HHD yielded excellent ICCs (0.75-0.97) for all muscle groups, except for interrater reliability of ankle extension (0.61). The corresponding SEMs% ranged from 8 to 28% and the SDCs% from 23 to 65%. MMT8 total score revealed excellent intra-and interrater reliability (ICC>0.9). Intrarater reliability of single muscle groups was substantial for shoulder and hip abduction, elbow and neck flexion, and hip extension (0.64-0.69); moderate for wrist (0.53) and knee extension (0.49) and fair for ankle extension (0.35). Interrater reliability was moderate for neck flexion (0.54) and hip abduction (0.44); fair for shoulder abduction, elbow flexion, wrist and ankle extension (0.20-0.33); and slight for knee extension (0.08). Correlations between the two tests were low for wrist, knee, ankle, and hip extension; moderate for elbow flexion, neck flexion and hip abduction; and good for shoulder abduction. In conclusion, the MMT8 total score is a reliable assessment to consider general muscle weakness in people with myositis but not for single muscle groups. In contrast, our results confirm that HHD can be recommended to evaluate strength of single muscle groups.
Departement: Health Professions
Organisational Unit: Institute of Physiotherapy (IPT)
Publication type: Article in scientific Journal
DOI : 10.1371/journal.pone.0194531
10.21256/zhaw-4861
ISSN: 1932-6203
URI: https://digitalcollection.zhaw.ch/handle/11475/12327
Appears in Collections:Publikationen Gesundheit

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