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Revised normative values for grip strength with the Jamar dynamometer.

Martine J H Peters1, Sonja I van Nes, Els K Vanhoutte

  • 1Department of Neurology, Maastricht University Medical Centre, Maastricht, The Netherlands.

Journal of the Peripheral Nervous System : JPNS
|April 21, 2011
PubMed
Summary
This summary is machine-generated.

This study provides updated grip strength (GS) normative values for the Jamar dynamometer, accounting for non-Gaussian distributions. These revised values are stratified by age and gender for improved clinical application in assessing chronic illnesses.

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Area of Science:

  • Biomedical Engineering
  • Clinical Assessment
  • Rehabilitation Medicine

Background:

  • The Jamar dynamometer is a key tool for assessing grip strength (GS) and its prognostic value in chronic illnesses.
  • Existing normative values for Jamar GS lack standardization and present conflicting results due to varied methodologies.
  • Previous studies have not adequately addressed the non-Gaussian distribution of GS data.

Purpose of the Study:

  • To establish revised, statistically robust normative values for Jamar grip strength.
  • To stratify these normative values by age and gender using advanced statistical methods.
  • To provide clinically applicable reference data for accurate patient assessment.

Main Methods:

  • Grip strength was measured in 720 healthy participants across seven age decades (≥50 men and women per decade).
  • Quantile regressions with restricted cubic spline functions were used to calculate normative values (median and fifth percentiles).
  • Statistical analysis considered non-Gaussian data distributions and examined potential confounding factors like hand dominance, anthropometrics, and lifestyle.

Main Results:

  • Revised normative values for Jamar grip strength, stratified by age and gender, were successfully generated.
  • Hand dominance was found to have no significant influence on grip strength measurements.
  • Other personal factors, such as weight and job categorization, showed minimal impact on the final normative values.

Conclusions:

  • This study presents updated and statistically refined normative grip strength values for the Jamar dynamometer.
  • The revised values offer improved accuracy for clinical use in diverse populations.
  • These findings will aid in more precise prognostic assessments and patient monitoring in chronic disease management.