Reliability of the handgrip strength test in elderly subjects with parkinson disease

Jorge H. Villafañe, Kristin Valdes, Riccardo Buraschi, Marco Martinelli, Luciano Bissolotti, Stefano Negrini

Research output: Contribution to journalArticlepeer-review


Background: The handgrip strength test is widely used by clinicians; however, little has been investigated about its reliability when used in subjects with Parkinson disease (PD). The purpose of this study was to investigate the test-retest reliability of the handgrip strength test for subjects with PD. Methods: The PD group consisted of 15 patients, and the control group consisted of 15 healthy subjects. Each patient performed 3 pain-free maximal isometric contractions on each hand on 2 occasions, 1 week apart. Intraclass correlation coefficient (ICC), standard error of measurement (SEM), and 95% limits of agreement (LOA) were calculated. The 2-way analysis of variance (ANOVA) was conducted to determine the differences between sides and groups. Results: Test-retest reliability of measurements of grip strength was excellent for dominant (ICC = 0.97; P =. 001) and non-dominant (ICC = 0.98; P =. 001) hand of participant with PD and (ICC = 0.99; P =. 001) and (ICC = 0.99; P =. 001) respectively, of healthy group. Conclusions: The Jamar hand dynamometer had fair to excellent test-retest reliability to test grip strength in participants with PD.

Original languageEnglish
Pages (from-to)54-58
Number of pages5
Issue number1
Publication statusPublished - Mar 1 2016


  • Grip strength
  • Hand
  • Parkinson disease
  • Test-retest

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery


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