ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2020
Cross-cultural adaptation and validation of the Polish version of the Spine Functional Index.
Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 12 citations in OpenAlex.
- A shortened 10-item Spine Functional Index: clinimetric properties indicate a reliable, responsive and practical measure.BMC musculoskeletal disorders · 2025Article
- Translation, cross-cultural adaptation, and validation of the 10-item spine functional index (SFI-10) in the Brazilians with musculoskeletal spine disorders.BMC musculoskeletal disorders · 2024Article
- Developing a shortened spine functional index (SFI-10) for patients with sub-acute/chronic spinal disorders: a cross-sectional study.BMC musculoskeletal disorders · 2024Article
- Cross-cultural adaptation and validation of the Lithuanian version of the Spine Functional Index.PloS one · 2024Observational
- Psychometric properties and validation of the polish version of the Fibromyalgia Impact Questionnaire (FIQ-Pol).BMC public health · 2023Article
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
Abstract
purposeThe purpose of this study was a cross-cultural adaptation of the Spine Functional Index to produce a Polish version (SFI-PL). Further, the psychometric properties were evaluated with standardized criteria patient reported outcome measures (PROMs) in a symptomatic Polish spine population.
methodsLinguistic adaptation complied with the International Society for Pharmacoeconomics and Outcomes Research (ISPOR) guidelines to produce the SFI-PL. Subjects with spine conditions, all areas and multi-area, were recruited from a Polish Specialist Hospital (n = 225, age = 45.7 ± 16.0 years, range 18-87, female = 60%, symptoms duration = 13.93 ± 27.56 weeks, range 5-84). Baseline internal consistency, reliability and validity were examined and included the SFI-PL, Oswestry Disability Index (ODI), Neck Disability Index (NDI), EuroQol 5 Dimensions, 5-level version (EQ-5D-5L) and an 11-point pain Numerical Rating Scale (NRS) with retest at 3-7 days (= 5 days). Practicality for readability was considered within the face and content validity and completion and scoring time calculated.
resultsStatistical analysis showed excellent internal consistency (α = 0.90) and high test-retest reliability (ICC = 0.98). The error score was determined with the SEM = 3.14 (MDC 90% CI = 7.33%). The construct validity analysis demonstrated strong correlations between the SFI-PL, the NDI (r = 0.73) and the ODI (r = 0.82); moderate with the EQ index value (0.70) and EQ-VAS (r = 0.56). Time to complete (229 s) and score (27 s) were determined.
conclusionsThe SFI-PL is a psychometrically sound PROM for Polish-speaking patients with spine conditions. The results support previous findings from the original-English and six other language versions for internal consistency, reliability, measurement error and validity. These slides can be retrieved under Electronic Supplementary Material.
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