Abstract
Purpose
The 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.
Methods
Linguistic 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.
Results
Statistical 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.
Conclusions
The 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.
Graphic abstract
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This study was partly funded by University of Rzeszow. The funding body was not involved in the design, collection, analysis and interpretation of data, writing the manuscript or decision to publish the manuscript.
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Appendices
Appendix 1
SPINE FUNCTIONAL INDEX – WERSJA POLSKA (SFI – PL) DATA: ____________________ |
IMIĘ I NAZWISKO: _______________ __ _________________________________________________ __ |
URAZ/PROBLEM: _________________ Szyja □ Środkowa Część Pleców □ Dolna Część Pleców □ |
PROSZĘ UZUPEŁNIĆ: Problemy z kręgosłupem mogą utrudniać wykonywanie codziennych czynności. Poniższa lista zawiera zdania, którymi ludzie zazwyczaj opisują swoje dolegliwości. Pomyśl o sobie na przestrzeni kilku ostatnich dni. Jeśli stwierdzenie dotyczy Ciebie, zaznacz kwadracik „CZĘŚCIOWO” lub „TAK”. Jeśli stwierdzenie nie dotyczy Ciebie, zaznacz kwadracik „NIE”.
Z POWODU MOJEGO KRĘGOSŁUPA
Nie 0 | Częściowo ½ | Tak 1 | |
---|---|---|---|
□ | □ | □ | 1. Pozostaję w domu przez większość czasu |
□ | □ | □ | 2. Często zmieniam pozycję dla większego komfortu |
□ | □ | □ | 3. Unikam ciężkich prac (np. sprzątania, podnoszenia rzeczy cięższych niż 5 kg, wykonywania prac w ogrodzie itp.) |
□ | □ | □ | 4. Częściej odpoczywam |
□ | □ | □ | 5. Proszę inne osoby, by zrobiły za mnie pewne czynności |
□ | □ | □ | 6. Odczuwam ból/mam problem prawie przez cały czas |
□ | □ | □ | 7. Mam trudność z podnoszeniem i noszeniem (np. toreb, zakupów o wadze do 5 kg) |
□ | □ | □ | 8. Zmienił mi się apetyt |
□ | □ | □ | 9. Chodzenie lub rekreacja lub aktywność sportowa jest utrudniona |
□ | □ | □ | 10. Mam trudności z normalnymi domowymi lub rodzinnymi obowiązkami i pracami |
□ | □ | □ | 11. Gorzej sypiam |
□ | □ | □ | 12. Potrzebuję pomocy w samoobsłudze (np. myciu i utrzymywaniu higieny) |
□ | □ | □ | 13. Moja codzienna aktywność jest utrudniona (praca, kontakty społeczne) |
□ | □ | □ | 14. Łatwiej się irytuję i/lub wpadam w złość |
□ | □ | □ | 15. Czuję się słabszy/-a i/lub zesztywniały/-a |
□ | □ | □ | 16. Moje niezależne przemieszczanie się jest utrudnione (prowadzenie samochodu, korzystanie z transportu publicznego) |
□ | □ | □ | 17. Potrzebuję pomocy przy ubieraniu się lub robię to wolniej |
□ | □ | □ | 18. Mam trudności, aby obrócić się w łóżku |
□ | □ | □ | 19. Mam trudności z koncentracją i/lub czytaniem |
□ | □ | □ | 20. Trudno jest mi siedzieć |
□ | □ | □ | 21. Mam trudności, gdy siadam i wstaję z krzesła |
□ | □ | □ | 22. Mogę utrzymywać pozycję stojącą tylko przez krótki czas |
□ | □ | □ | 23. Mam trudność z kucaniem i/lub klękaniem |
□ | □ | □ | 24. Mam trudność ze schylaniem się (np. podnoszeniem rzeczy lub nakładaniem skarpetek) |
□ | □ | □ | 25. Wychodzę po schodach wolniej lub trzymam się barierki |
Wynik SFI - PL: W celu obliczenia wyniku – dodaj zaznaczone pola: |
_______WYNIK CAŁKOWITY (punkty SFI-PL) 100 Skala: 100 – (WYNIK CAŁKOWITYx4) = _________% |
MDC* (90% CI*): Szyja = 6.8% lub 1.7 SFI-PL pkt.; Środkowa i Dolnych Pleców = 7.7% lub 1,9 SFI-PL pkt.; |
Cały kręgosłup = 7.3% lub 1.8 SFI-PL pkt. Zmiana mniejsza niż podana może wynikać z błędu. |
Appendix 2
See Table 6.
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Bejer, A., Kupczyk, M., Kwaśny, J. et al. Cross-cultural adaptation and validation of the Polish version of the Spine Functional Index. Eur Spine J 29, 1424–1434 (2020). https://doi.org/10.1007/s00586-019-06250-4
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DOI: https://doi.org/10.1007/s00586-019-06250-4