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Titre : | Rasch Analysis of the 22 Knee Injury and Osteoarthritis Outcome ScorePhysical Function Items in Italian Patients With Knee Osteoarthritis (2013) |
Auteurs : | Franco Franchignoni ; Fausto Salaffi ; Andrea Giordano ; et al. |
Type de document : | Article |
Dans : | Archives of Physical Medicine and Rehabilitation (2013/3, 2013) |
Article en page(s) : | pp. 480-487 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Évaluation de résultat (soins) ; Gonarthrose ; Psychométrie ; Rééducation et réadaptation |
Mots-clés: | Osteoarthritis ; Knee ; Outcome Assessment (Health Care) ; Psychometrics |
Résumé : |
"Objectives To replicate previous Rasch analysis (RA) that yielded the 7-item Physical Function Short Form of the Knee Injury and Osteoarthritis Outcome Score (KOOS-PS7) in order to verify the consistency of the item selection process, and to analyze its main psychometric properties in a sample of Italian patients with osteoarthritis (OA). Design Methodological research on cross-sectional data from a convenience sample. Setting University hospital. Participants Outpatients with symptomatic OA of the knee (N=200; women, 73%; mean age, 69.4y). Interventions Not applicable. Main Outcome Measure The KOOS-PF22 (22 items comprising the 2 KOOS domains of activities of daily living and sport/recreation). Its dimensionality was investigated using exploratory factor analysis. RA was performed on KOOS-PF22, KOOS-PS7, and an item set (called KOOS-PS12) obtained by removing from KOOS-PF22 all misfitting items. Results KOOS-PF22 showed a 2-factor structure, with the first one largely prevailing. Ten of its 22 items did not fit the Rasch model, while item dependency was present in 7 item pairs. Five of 7 KOOS-PS7 items and all KOOS-PS12 items showed acceptable fit to the Rasch model. The person separation reliability was .79 for KOOS-PS7 and .90 for KOOS-PS12; Cronbach alpha was .81 for KOOS-PS7 and .92 for KOOS-PS12. Conclusions RA was not able to replicate the selection process of the items included in KOOS-PS7. KOOS-PS7 reliability levels indicate that the instrument seems more useful for group decisions than for everyday clinical application in single patients. To achieve a short form of KOOS-PF22 valid for a wide spectrum of individuals with knee OA, further psychometric studies are warranted." |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/journal/archives-of-physical-medicine-and-rehabilitation |