Intra- and inter-rater reliability of electrical impedance myography using adhesive electrodes in healthy volunteers

In spite of the growing use of the electrical impedance myography (EIM) measures for clinical assessment and follow-up of diseased muscle tissue, reliability studies are scarce. We evaluate the reliability of the (EIM) technique using four adhesive electrodes over the muscle of interest. Intra- and...

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Bibliographic Details
Published in:Journal of electromyography and kinesiology 2020-12, Vol.55, p.102456-102456, Article 102456
Main Authors: Martinez-Gonzalez, Mariano, Montilla-Herrador, Joaquina, García-Vidal, Jose A., Escolar-Reina, Pilar, Gacto-Sánchez, Mariano, Medina-Mirapeix, Francesc
Format: Article
Language:English
Subjects:
Adult
Agreement
Electric Impedance
Electrical impedance myography
Electrodes - standards
Female
Healthy Volunteers
Humans
Male
Muscle
Muscle, Skeletal - physiology
Myography - instrumentation
Myography - methods
Myography - standards
Observer Variation
Reliability measures
Reproducibility of Results
Surgical Tape - standards
Young Adult
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Summary:In spite of the growing use of the electrical impedance myography (EIM) measures for clinical assessment and follow-up of diseased muscle tissue, reliability studies are scarce. We evaluate the reliability of the (EIM) technique using four adhesive electrodes over the muscle of interest. Intra- and inter-rater reliability was studied within the same session and between sessions. Thirty-one healthy and volunteer subjects aged between 20 and 26 years were recruited. Phase angle, reactance and resistance were assessed for each EIM measurement. Intraclass correlation coefficient (ICC) was used to determine the relative reliability. Absolute reliability was expressed as the standard error of measurement and the minimum detectable change. Relative reliability within the same session and between sessions for the EIM technique was excellent (ICCs > 0.9) concerning both intra- and inter-rater reliability, except for the component reactance. The absolute reliability was very high for the three EIM components. EIM measures using four adhesive electrodes over the area of interest is a reliable technique to assess muscle tissue status. This study confirms that these measurement results barely vary depending on the examiner and the moment. The present study also confirms phase angle as the least affected EIM component by examiner and evaluation moment.
ISSN:1050-6411
1873-5711
DOI:10.1016/j.jelekin.2020.102456