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Modernising grip dynamometry: Inter-instrument reliability between GripAble and Jamar.

Sharah Abdul Mutalib1,2, Michael Mace3, Chloe Seager3

  • 1GripAble Limited, London, UK. sharahamo@imperial.ac.uk.

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|January 25, 2022
PubMed
Summary

The new GripAble device shows excellent reliability for measuring maximum grip strength (MGS). However, its readings are not interchangeable with the Jamar PLUS+ for patient monitoring.

Keywords:
DynamometryGrip strengthGripAbleHand rehabilitationHand strengthJamarOccupational therapyOutcome measurePhysiotherapyReliability

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Clinical Measurement

Background:

  • Maximum grip strength (MGS) is a key indicator of overall health and physiological status.
  • Accurate and reliable MGS measurement tools are essential for valid health assessments.
  • The GripAble, a mobile hand grip device, has been developed for MGS assessment.

Purpose of the Study:

  • To evaluate the performance of the GripAble device for measuring maximum grip strength.
  • To assess the inter-instrument reliability of GripAble against the established Jamar PLUS+ dynamometer.

Main Methods:

  • Sixty-three participants (N=63) provided MGS data from both hands using GripAble and Jamar PLUS+.
  • Inter-instrument reliability was analyzed using Intraclass Correlation (ICC), regression, and Bland-Altman analysis.

Main Results:

  • GripAble demonstrated good-to-excellent inter-instrument reliability with the Jamar PLUS+ (ICC3,1 = 0.906).
  • GripAble measurements were equivalent to 69% of Jamar PLUS+ measurements.
  • A proportional difference was observed, with MGS differences increasing with higher grip strength readings.

Conclusions:

  • GripAble is a reliable tool for measuring grip strength.
  • Direct interchange or translation of MGS readings between GripAble and Jamar PLUS+ is not recommended for serial measurements.
  • Future work includes collecting normative MGS data for GripAble to facilitate comparisons.