Jorge H Villafañe1, Kristin Valdes2, Riccardo Buraschi1, Marco Martinelli3, Luciano Bissolotti4, Stefano Negrini5. 1. IRCCS Don Gnocchi Foundation, Milan, Italy. 2. Drexel University, Philadelphia, PA, USA. 3. Casa di Cura Domus Salutis, Brescia, Italy. 4. Casa di Cura Domus Salutis, Brescia, Italy; LARIN: Laboratory of Neuromuscular Rehabilitation and Adapted Physical Activity, Brescia, Italy. 5. IRCCS Don Gnocchi Foundation, Milan, Italy; University of Brescia, Brescia, Italy.
Abstract
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.
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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