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Reliability of the Handgrip Strength Test in Elderly Subjects With Parkinson Disease
Jorge H Villafañe1, Kristin Valdes2, Riccardo Buraschi1
1IRCCS Don Gnocchi Foundation, Milan, Italy.
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.
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