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    Validity and reliability of Squegg device in measuring isometric handgrip strength

    Bairapareddy, KC, Khaleel, A, Akbar, S, Maherban, H, Mehdiyeva, F, Rasti, F, Tamim, M, Abdelbasset, WK, Ezzat, W, Reddy, RS, Tedla, JS, Ramakrshnan, S, Hussein, RS, Alaparthi, GK ORCID logoORCID: https://orcid.org/0000-0001-7596-3459 and Elsayed, SH (2023) Validity and reliability of Squegg device in measuring isometric handgrip strength. European Review for Medical and Pharmacological Sciences, 27 (21). pp. 10247-10254. ISSN 1128-3602

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    Abstract

    OBJECTIVE: The quantitative measurement of handgrip strength is important in assessing and charting the progress of patients with neuromuscular diseases. The aim of this research was to determine the intra-rater and inter-rater reliability and the validity of the Squegg digital dynamometer. SUBJECTS AND METHODS: Twenty-one females and nine male participants with an age range between 18 and 40 years volunteered for the study. Three testers each took three measurements with a Squegg device and a Jamar dynamometer using standardized measurement techniques. Intra- and inter-tester reliability were calculated using the intra-class correlation coefficient (ICC). To investigate the relationship between hand measures and isometric handgrip strength, the Pearson correlation coefficient test was used. To determine the agreement between the two devices, a Bland Altman plot was constructed, and the concurrent validity of Squegg was calculated. RESULTS: The intra-rater reliability coefficients for both Jamar and Squegg were greater than 0.99 for all three testers, indicating excellent intra-rater reliability. The inter-rater reliability of Jamar (ICC=0.93) and Squegg (ICC=0.87) was excellent. With an ICC of 0.844 and an r-value of 0.720, Squegg with Jamar demonstrates good validity and statistical significance (p=0.001). CONCLUSIONS: The isometric handgrip strength and hand measures showed a moderate correlation in the study population. The Squegg isometric handgrip dynamometer has good concurrent validity and great intra- and inter-rater reliability in healthy individuals. The validity of Squegg in patients with neuromuscular diseases that affect hand function has to be investigated further.

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