A1 Journal article (refereed)
Psychometric Properties of the Scoliosis Research Society Questionnaire (Version 22r) Domains Among Adults With Spinal Deformity : A Rasch Measurement Theory Analysis (2022)


Kyrölä, K., Hiltunen, S., Uimonen, M. M., Ylinen, J., Häkkinen, A., & Repo, J. P. (2022). Psychometric Properties of the Scoliosis Research Society Questionnaire (Version 22r) Domains Among Adults With Spinal Deformity : A Rasch Measurement Theory Analysis. Neurospine, 19(2), 422-433. https://doi.org/10.14245/ns.2143354.677


JYU authors or editors


Publication details

All authors or editors: Kyrölä, Kati; Hiltunen, Susanna; Uimonen, Mikko M.; Ylinen, Jari; Häkkinen, Arja; Repo, Jussi P.

Journal or series: Neurospine

ISSN: 2586-6583

eISSN: 2586-6591

Publication year: 2022

Publication date: 15/05/2022

Volume: 19

Issue number: 2

Pages range: 422-433

Publisher: The Korean Spinal Neurosurgery Society

Publication country: Korea, Republic of (South Korea)

Publication language: English

DOI: https://doi.org/10.14245/ns.2143354.677

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82337


Abstract

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.


Keywords: spinal diseases; scoliosis; quality of life; measuring instruments (indicators); psychometrics; Rasch model

Free keywords: spinal diseases; rasch measurement theory; latent trait theory; SRS-22r; outcomes research; health related quality of life


Contributing organizations


Ministry reporting: Yes

VIRTA submission year: 2022

JUFO rating: 1


Last updated on 2024-12-10 at 13:45