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Strength and function in the normal and rheumatoid hand.

E Jones1, J G Hanly, R Mooney

  • 1Department of Medicine, Dalhousie University, Halifax, NS, Canada.

The Journal of Rheumatology
|September 1, 1991
PubMed
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The Martin vigorimeter reliably measures grip strength in rheumatoid arthritis (RA) patients. Grip strength improved with treatment, correlating with reduced joint inflammation and better hand function.

Area of Science:

  • Rehabilitation Medicine
  • Rheumatology
  • Orthopedics

Background:

  • Rheumatoid arthritis (RA) significantly impairs hand function and grip strength.
  • Accurate measurement tools are crucial for assessing disease progression and treatment efficacy in RA.
  • The Martin vigorimeter is a device used to measure grip strength.

Purpose of the Study:

  • To reevaluate the Martin vigorimeter for grip strength measurement in healthy individuals and RA patients.
  • To investigate the correlation between grip strength and hand function using the Jebsen hand function tests and Purdue pegboard test.
  • To assess changes in grip strength and hand function before and after treatment in RA patients.

Main Methods:

  • The Martin vigorimeter, Jebsen hand function tests, and Purdue pegboard test were used.

Related Experiment Videos

  • Test-retest and interrater reliability of the vigorimeter were assessed.
  • Seventeen RA patients were evaluated at intervals of 1 to 16 weeks, measuring grip strength, active joint count, and hand function.

    • Main Results:

    • The Martin vigorimeter demonstrated excellent test-retest (r > 0.911) and interrater (r > 0.915) reliability.
    • The Jebsen and Purdue tests showed high test-retest reliability in healthy individuals (r > 0.97 and r > 0.94, respectively).
    • RA patients showed significant improvements in active joint count and grip strength post-treatment, with grip strength improvement correlating with reduced joint inflammation. Hand function tests were significantly impaired in RA patients.

    Conclusions:

    • The Martin vigorimeter is a reliable tool for measuring grip strength in RA.
    • Grip strength is a valid indicator of disease activity and treatment response in RA.
    • Comprehensive hand function assessments are essential for managing RA patients.