Comparison of Rolyan and Jamar dynamometers for measuring grip strength

Virgil Mathiowetz

Research output: Contribution to journalArticlepeer-review

165 Scopus citations

Abstract

This study compared the Jamar and Rolyan hydraulic dynamometers to determine their concurrent validity with known weights as well as their inter-instrument reliability and concurrent validity for measuring grip strength in a clinical setting. Thirty females and 30 males were tested on these two grip strength measurement devices using a repeated measure design. Results showed that the Jamar and Rolyan dynamometers have acceptable concurrent validity with known weights (that is, correlation coefficients were r ≥ 0.9994), excellent inter-instrument reliability (that is, intraclass correlation coefficients ranged from 0.90 to 0.97) and strong concurrent validity (that is, no significant differences between dynamometers' scores). Data indicate that Jamar and Rolyan dynamometers measure grip strength equivalently and can be used interchangeably. Thus, therapists using the Rolyan dynamometer are justified in using published normative data, which were collected with the Jamar dynamometer.

Original languageEnglish (US)
Pages (from-to)201-209
Number of pages9
JournalOccupational Therapy International
Volume9
Issue number3
DOIs
StatePublished - 2002

Keywords

  • Hand strength
  • Occupational therapy evaluation
  • Rehabilitation
  • Reliability

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