Psychometric Properties of the Scoliosis Research Society Questionnaire (Version 22r) Domains Among Adults With Spinal Deformity : A Rasch Measurement Theory Analysis
| Autor: | Kati Kyrölä, Susanna Hiltunen, Mikko M. Uimonen, Jari Ylinen, Arja Häkkinen, Jussi P. Repo |
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| Přispěvatelé: | Tampere University, Clinical Medicine, Department of Musculoskeletal Diseases |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
skolioosi
spinal diseases elämänlaatu 3121 Internal medicine 3126 Surgery anesthesiology intensive care radiology outcomes research psykometriikka Raschin malli selkäsairaudet mittarit (mittaus) health related quality of life Surgery latent trait theory Neurology (clinical) SRS-22r rasch measurement theory |
| Popis: | Objective: Adults with degenerative spinal deformity (ASD) have lower health-related quality of life (HRQL) compared to the general population. Applying Rasch Measurement Theory (RMT), this study tested the revised Scoliosis Research Society-22 (SRS-22r) HRQL instrument among symptomatic adult patients with degenerative spinal disorders and varying degrees of ASD. Methods: SRS-22r data from 637 outpatient spine clinic patients with degenerative spine conditions were investigated for unidimensionality, item/scale fit, differential item functioning (DIF), scale coverage/targeting, and person separation index (PSI) using RMT. Results: Unidimensionality of the SRS-22r was not supported for either the total score or for three of its five domains. Item fit was acceptable for 11/22 items. The individual domains showed good coverage despite the degree of structural disorders. Ordered thresholds were achieved by merging response categories in some of the items. DIF towards age or sex was found in 11/22 items and in some domain items. The PSI exceeded 0.7 for the SRS-22r total score. Conclusion: The individual domain scores of the SRS-22r perform better than the total score providing good coverage and targeting among patients with ASD. Refinements of items and domains may improve the structural validity of the instrument to meet the criteria for measuring ASD patients, even when multidimensionality persists. peerReviewed |
| Databáze: | OpenAIRE |
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