The e-MSWS-12: improving the multiple sclerosis walking scale using item response theory.
Background: The Multiple Sclerosis Walking Scale (MSWS-12) is the predominant patient-reported measure of multiple sclerosis (MS) -elated walking ability, yet it had not been analyzed using item response theory (IRT), the emerging standard for patient-reported outcome (PRO) validation. This study ai...
| Publicado en: | Quality of Life Research Vol. 25; no. 12; pp. 3221 - 3231 |
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| Autores principales: | , , , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Dec2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=119356028&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 119356028 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09629343 GPQ jtl: Quality of Life Research issn: 09629343 maglogo: N pubinfo: dt: Dec2016 vid: 25 iid: 12 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 119356028 119356028 NLM27342237 119356028 10.1007/s11136-016-1342-2 NLM27342237 119356028 ppf: 3221 ppct: 10 formats: fmt: @attributes: type: P tig: atl: The e-MSWS-12: improving the multiple sclerosis walking scale using item response theory. aug: au: Engelhard, Matthew Schmidt, Karen Engel, Casey Brenton, J. Nicholas Patek, Stephen Goldman, Myla Engelhard, Matthew M Schmidt, Karen M Engel, Casey E Patek, Stephen D Goldman, Myla D affil: Department of Systems and Information Engineering , University of Virginia , Charlottesville 22904 USA sug: subj: Disability Evaluation Multiple Sclerosis Therapy Sickness Impact Profile Walking Physiology Middle Age Aged Male Aged, 80 and Over Female Adult Human Funding Source Scales Clinical Assessment Tools Middle Aged: 45-64 years Aged: 65+ years Aged, 80 & over Adult: 19-44 years Male Female ab: Background: The Multiple Sclerosis Walking Scale (MSWS-12) is the predominant patient-reported measure of multiple sclerosis (MS) -elated walking ability, yet it had not been analyzed using item response theory (IRT), the emerging standard for patient-reported outcome (PRO) validation. This study aims to reduce MSWS-12 measurement error and facilitate computerized adaptive testing by creating an IRT model of the MSWS-12 and distributing it online.Methods: MSWS-12 responses from 284 subjects with MS were collected by mail and used to fit and compare several IRT models. Following model selection and assessment, subpopulations based on age and sex were tested for differential item functioning (DIF).Results: Model comparison favored a one-dimensional graded response model (GRM). This model met fit criteria and explained 87 % of response variance. The performance of each MSWS-12 item was characterized using category response curves (CRCs) and item information. IRT-based MSWS-12 scores correlated with traditional MSWS-12 scores (r = 0.99) and timed 25-foot walk (T25FW) speed (r = -0.70). Item 2 showed DIF based on age (χ 2 = 19.02, df = 5, p < 0.01), and Item 11 showed DIF based on sex (χ 2 = 13.76, df = 5, p = 0.02).Conclusions: MSWS-12 measurement error depends on walking ability, but could be lowered by improving or replacing items with low information or DIF. The e-MSWS-12 includes IRT-based scoring, error checking, and an estimated T25FW derived from MSWS-12 responses. It is available at https://ms-irt.shinyapps.io/e-MSWS-12 . pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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