Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model

Abstract Background The disabilities of the arm, shoulder and hand (DASH) is a commonly used region-specific patient-reported outcome measure (PROM) that quantify upper extremity function (activity limitation) and symptoms. Current evidence suggests that measurement properties of the adapted version...

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Autor principal:	Ali H. Alnahdi
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Upper limb Validity Psychometrics Measurement properties Outcome measure Public aspects of medicine RA1-1270
Acceso en línea:	https://doaj.org/article/d16a957fb6c240318891ee843c7b0c2f
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spelling	oai:doaj.org-article:d16a957fb6c240318891ee843c7b0c2f2021-11-08T10:59:01ZStructural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model10.1186/s41687-021-00392-02509-8020https://doaj.org/article/d16a957fb6c240318891ee843c7b0c2f2021-11-01T00:00:00Zhttps://doi.org/10.1186/s41687-021-00392-0https://doaj.org/toc/2509-8020Abstract Background The disabilities of the arm, shoulder and hand (DASH) is a commonly used region-specific patient-reported outcome measure (PROM) that quantify upper extremity function (activity limitation) and symptoms. Current evidence suggests that measurement properties of the adapted versions of the DASH are not sufficiently examined. The Arabic DASH has evidence supporting its internal consistency, test–retest reliability, construct validity and responsiveness. On the other hand, the validity of the assumed unidimensionality of the Arabic DASH has not been examined previously. The aim of this study was to examine the structural validity of the Arabic DASH in patients with upper extremity musculoskeletal disorders using Rasch measurement model. Methods Patients with upper extremity musculoskeletal disorders were recruited and were asked to complete the Arabic DASH at their initial visit to physical therapy departments. The overall fit of the Arabic DASH to the requirement of the Rasch measurement model was examined using chi-square statistics for item-trait interaction, mean item and person fit residuals. The fit of individual items, thresholds ordering, local dependency, differential item functioning (DIF), and unidimensionality using the t-test approach were also examined. Results The Arabic DASH did not fit the Rasch measurement model initially (χ2 = 179.04, p < 0.001) with major breach of local item independence and a pattern of high residual correlations among the activity-related items and among the impairment-related items. Combining items into activity-limitation and impairment testlets accommodated the local dependency and led to satisfactory fit of the Arabic DASH to the requirement of the Rasch measurement model (χ2 = 3.99, p = 0.41). Conclusions Rasch measurement model supports the structural validity of the Arabic DASH as a unidimensional measure after the accommodation of local dependency.Ali H. AlnahdiSpringerOpenarticleUpper limbValidityPsychometricsMeasurement propertiesOutcome measurePublic aspects of medicineRA1-1270ENJournal of Patient-Reported Outcomes, Vol 5, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Upper limb Validity Psychometrics Measurement properties Outcome measure Public aspects of medicine RA1-1270
spellingShingle	Upper limb Validity Psychometrics Measurement properties Outcome measure Public aspects of medicine RA1-1270 Ali H. Alnahdi Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model
description	Abstract Background The disabilities of the arm, shoulder and hand (DASH) is a commonly used region-specific patient-reported outcome measure (PROM) that quantify upper extremity function (activity limitation) and symptoms. Current evidence suggests that measurement properties of the adapted versions of the DASH are not sufficiently examined. The Arabic DASH has evidence supporting its internal consistency, test–retest reliability, construct validity and responsiveness. On the other hand, the validity of the assumed unidimensionality of the Arabic DASH has not been examined previously. The aim of this study was to examine the structural validity of the Arabic DASH in patients with upper extremity musculoskeletal disorders using Rasch measurement model. Methods Patients with upper extremity musculoskeletal disorders were recruited and were asked to complete the Arabic DASH at their initial visit to physical therapy departments. The overall fit of the Arabic DASH to the requirement of the Rasch measurement model was examined using chi-square statistics for item-trait interaction, mean item and person fit residuals. The fit of individual items, thresholds ordering, local dependency, differential item functioning (DIF), and unidimensionality using the t-test approach were also examined. Results The Arabic DASH did not fit the Rasch measurement model initially (χ2 = 179.04, p < 0.001) with major breach of local item independence and a pattern of high residual correlations among the activity-related items and among the impairment-related items. Combining items into activity-limitation and impairment testlets accommodated the local dependency and led to satisfactory fit of the Arabic DASH to the requirement of the Rasch measurement model (χ2 = 3.99, p = 0.41). Conclusions Rasch measurement model supports the structural validity of the Arabic DASH as a unidimensional measure after the accommodation of local dependency.
format	article
author	Ali H. Alnahdi
author_facet	Ali H. Alnahdi
author_sort	Ali H. Alnahdi
title	Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model
title_short	Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model
title_full	Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model
title_fullStr	Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model
title_full_unstemmed	Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model
title_sort	structural validity of the arabic version of the disabilities of the arm, shoulder and hand (dash) using rasch measurement model
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/d16a957fb6c240318891ee843c7b0c2f
work_keys_str_mv	AT alihalnahdi structuralvalidityofthearabicversionofthedisabilitiesofthearmshoulderandhanddashusingraschmeasurementmodel
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Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model

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