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dc.contributor.authorIndrekvam, Kari
dc.contributor.authorMyklebust, Tor Åge
dc.contributor.authorAustevoll, Ivar Magne
dc.contributor.authorHermansen, Erland
dc.contributor.authorBANITALEBI, HASAN
dc.contributor.authorBånerud, Ingrid Fjeldheim
dc.contributor.authorWeber, Clemens
dc.contributor.authorBrisby, Helena
dc.contributor.authorBrox, Jens Ivar
dc.contributor.authorHellum, Christian
dc.contributor.authorStorheim, Kjersti
dc.contributor.authorBanitalebi, Hasan
dc.date.accessioned2024-12-17T06:47:43Z
dc.date.available2024-12-17T06:47:43Z
dc.date.created2024-08-30T14:34:21Z
dc.date.issued2024
dc.identifier.citationEuropean spine journal. 2024, 33 (11), 4270-4280.en_US
dc.identifier.issn0940-6719
dc.identifier.urihttps://hdl.handle.net/11250/3169853
dc.description.abstractPurpose To evaluate the responsiveness of the original low back pain specific Oswestry Disability Index (ODI) and the spinal stenosis specific Zürich Claudication Questionnaire (ZCQ), and to investigate cut-off values for clinical “success” for ODI and ZCQ in surgically treated patients with lumbar spinal stenosis (LSS). Methods We included 601 LSS patients (218 with, 383 without degenerative spondylolisthesis) from the NORDSTEN trials. Outcome measures included ODI and ZCQ (symptom severity and physical function scales) with three alternative response parameters: scores at follow-up, absolute and relative changes from baseline to two-year follow-up. Effect size and standardised response mean evaluated internal responsiveness. External responsiveness was assessed by the Spearman rank correlation between patient-reported global perceived effect scale (GPE) and ODI and ZCQ, and receiver operating characteristics (ROC). We evaluated which cut-off values could maximise the percentage of correctly classified patients according to the GPE-anchor “completely recovered” / “much improved” for each parameter. Results Internal and external responsiveness were high for all three indices with effect sizes, standardized response means, ROC and corresponding area under the curve > 0.8. Correlations with GPE responses were moderate (> 0.50) for absolute change and strong (> 0.67) for relative change and follow-up scores. The 30% ODI relative change cut-off correctly classified 81% of patients to “success”, within a range of accurate cut-offs according to the GPE-anchor. Conclusion ODI and ZCQ demonstrate comparable responsiveness in evaluating outcomes for surgically treated LSS patients. The 30% ODI threshold was consistent with treatment “success” in NORDSTEN trials.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleResponsiveness of the Oswestry Disability Index and Zurich Claudication Questionnaire in patients with lumbar spinal stenosis: evaluation of surgically treated patients from the NORDSTEN studyen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doi10.1007/s00586-024-08440-1
dc.identifier.cristin2290868
dc.source.journalEuropean spine journalen_US
dc.source.volume33en_US
dc.source.issue11en_US
dc.source.pagenumber4270-4280en_US


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal