Kalkers, Nynke F; Galan, Ingrid; Kerbrat, Anne; Tacchino, Andrea; Kamm, Christian P.; O'Connell, Karen; McGuigan, Chris; Edan, Gilles; Montalban, Xavier; Uitdehaag, Bernard Mj; Mokkink, Lidwine B (2021). Differential item functioning of the Arm function in Multiple Sclerosis Questionnaire (AMSQ) by language, a study in six countries. Multiple sclerosis journal, 27(1), pp. 90-96. Sage 10.1177/1352458519895450
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Kalkers, 2019, Differential item functioning of the Arm function in MS.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (92kB) |
BACKGROUND
The Arm function in Multiple Sclerosis Questionnaire (AMSQ) has been developed as a self-reported measure of arm and hand functioning for patients with multiple sclerosis (MS). The AMSQ was originally developed in Dutch and to date translated into five languages (i.e. English, German, Spanish, French, and Italian).
OBJECTIVE
The aim of this study was to evaluate differential item functioning (DIF) of the AMSQ in these languages.
METHODS
We performed DIF analyses, using "language" as the polytomous group variable. To detect DIF, logistic regression and item response theory principles were applied. Multiple logistic regression models were evaluated. We used a pseudo R2 value of 0.02 or more as the DIF threshold.
RESULTS
A total of 1733 male and female patients with all subtypes of MS were included. The DIF analysis for the whole dataset showed no uniform or non-uniform DIF on any of the 31 items. All R2 values were below 0.02.
CONCLUSION
The AMSQ is validated in six languages. All items have the same meaning to MS patients in Dutch, English, German, Spanish, French, and Italian. This validation study enables use of the AMSQ in international studies, for monitoring treatment response and disease progression.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology |
UniBE Contributor: |
Kamm, Christian Philipp |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1352-4585 |
Publisher: |
Sage |
Language: |
English |
Submitter: |
Chantal Kottler |
Date Deposited: |
20 Jan 2020 13:00 |
Last Modified: |
05 Dec 2022 15:35 |
Publisher DOI: |
10.1177/1352458519895450 |
PubMed ID: |
31845614 |
Uncontrolled Keywords: |
Multiple sclerosis arm function differential item functioning hand function item response theory patient-reported outcome measure questionnaire upper extremity function |
BORIS DOI: |
10.7892/boris.137734 |
URI: |
https://boris.unibe.ch/id/eprint/137734 |
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