Confiabilidad y mínimo cambio detectable de la medición de fuerza de rotadores de hombro con handgrip

Paula Carolina Dib; Gimena Paola Cardoso; Mauro Federico Andreu; Silvina García Schustereder; Marisol Alejandra Galloli

doi:10.54789/rs.v1i2.12

Authors

Paula Carolina Dib Sanatorio Anchorena San Martín, Buenos Aires, Argentina
Gimena Paola Cardoso Hospital Donación Francisco Santojanni, Ciudad Autonoma de Buenos Aires, Argentina
Mauro Federico Andreu Universidad Nacional de la Matanza, Buenos Aires, Argentina
Silvina García Schustereder Hospital Dr. Pedro Fiorito, Buenos Aires, Argentina
Marisol Alejandra Galloli Hospital Dr. Pedro Fiorito, Buenos Aires, Argentina

DOI:

https://doi.org/10.54789/rs.v1i2.12

Keywords:

reproducibility of results, muscle strength dynamometer, shoulder, rotator cuff, muscle strength, reliability

Abstract

Objective: to determine the interrater reliability of shoulder rotator strength measurement using a hand-grip dynamometer.

Material and methods: Twenty-one healthy volunteers were included in the study. Reliability between the first and second measurements, performed by two different operators for external and internal rotation assessment of the dominant and non-dominant limb, was analyzed. Intraclass correlation coefficients (ICCs) and their corresponding 95% confidence intervals were used. In order to determine the threshold for true change in hand-grip strength when different raters record measurements, the minimal detectable change was calculated.

Results: Excellent interrater reliability was found for dominant and non-dominant external rotation (ICC = 0.80 [95% CI: 0.58-0.92] and ICC = 0.80 [95% CI: 0.56-0.91], respectively). Interrater reliability proved to be fair (ICC = 0.56 [95% CI: 0.18-0.80] to good (ICC = 0.61 [95% CI: 0.25-0.82]) for dominant and non-dominant internal rotation, respectively.

Conclusion: This study shows that interrater reliability of hand-grip dynamometer measurements is excellent for external rotators and fair to good for internal rotators.

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