Psychometric evaluation of the Disabilities of the Arm, Shoulder and Hand (DASH) with Dupuytren’s contracture: validity evidence using Rasch modeling

BMC Musculoskeletal Disorders

Research Article

Lee Shepstone¹  Christina Jerosch-Herold²  Johanne Higgins³  Nancy J Forget⁴ 

[1] Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK;School of Health Sciences, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK;École de réadaptation, Université de Montréal, Montreal, Canada;Centre de recherche interdisciplinaire en réadaptation du Montréal métropolitain (CRIR), Montreal, Canada;Institut de réadaptation Gingras-Lindsay de Montréal, Montreal, Canada;École de santé publique de l’Université de Montréal (ESPUM), Université de Montréal, Montreal, Canada;School of physical and occupational therapy, McGill University, Montreal, Canada;Centre de la main, Centre hospitalier de l’Université de Montréal (CHUM), Montreal, Canada;

关键词: Outcome assessment;    Activities of daily living;    Disability evaluation;    Psychometric properties;    Validity evidence;    Item-response theory;    Rasch analysis;    Dupuytren’s contracture;    Musculoskeletal disorder;   

DOI  :  10.1186/1471-2474-15-361

 received in 2014-02-20, accepted in 2014-10-17,  发布年份 2014

来源: Springer

【 摘 要 】

BackgroundDupuytren’s contracture is a progressive, fibroproliferative disorder that causes fixed finger contractures and can lead to disability. With the advances of new therapeutic interventions, the necessity to assess the functional repercussions of this condition using valid, reliable and sensitive outcome measures is of growing interest. The Disabilities of the Arm, Shoulder and Hand (DASH) is one frequently used patient-reported outcome measure but its reliability and validity have never been demonstrated specifically for a population affected with Dupuytren’s contracture. The objective of this study was to evaluate the psychometric properties of the DASH, with focus on validity evidence using the Rasch measurement model.MethodsSecondary analysis was performed on data collected as part of a randomised clinical trial. One hundred fifty-three participants diagnosed with Dupuytren’s contracture completed the DASH at four time points (pre-op, 3, 6 and 12 months post-op). Baseline data were analysed using traditional analysis and to test whether they adhered to the expectations of the Rasch model. Post-intervention data were subsequently included and analyzed to determine the effect of the intervention on the items.ResultsDASH scores demonstrated large ceiling effects at all time points. Initial fit to the Rasch model revealed that the DASH did not adhere to the expectations of the Rasch partial credit model (χ2 = 119.92; p < 0.05). Multiple items displayed inadequate response categories and two items displayed differential item functioning by gender. Items were transformed and one item deleted leading to an adequate fit. Remaining items fit the Rasch model but still do not target well the population under study.ConclusionsThe original version of the 30-item DASH did not display adequate validity evidence for use in a population with Dupuytren’s contracture. Further development is required to improve the DASH for this population.

【 授权许可】

Unknown   
© Forget et al.; licensee BioMed Central Ltd. 2014. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.