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European Spine Journal

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01-11-2018 | Original Article

Validation of the Croatian version of the Oswestry Disability Index

Authors: Ivan Domazet, Jakob Nemir, Petra Barl, Krešimir Saša Đurić, Ivan Pašalić, Hrvoje Barić, Marin Stančić

Published in: European Spine Journal | Issue 11/2018

Abstract

Purpose

To translate, cross-culturally adapt, and validate the Croatian version of the Oswestry Disability Index (ODI).

Methods

The original English-language ODI was cross-culturally adapted into Croatian and then evaluated in a group of 114 patients with chronic low back pain (LBP) at the Department of Neurosurgery, Zagreb University School of Medicine. Confirmatory factor analysis (CFA) was conducted with three models: two were theory driven (unidimensional and two dimensional—static and dynamic factors); the other was based on our exploratory factor analysis (EFA). Internal consistency and test–retest reliability were evaluated using Cronbach’s α and the intraclass correlation coefficient (ICC), respectively. Construct validity was assessed by evaluating the correlation between the ODI and Visual Analogue Scale (VAS), and between the ODI and 36-item short form survey (SF-36) scores.

Results

The EFA-derived two-dimensional structure explained 82.7% of the total variance and was significantly better than the other models (P < 0.001); however, none of the models had acceptable fit. Internal consistency (Cronbach α = 0.84) and test–retest reliability (ICC = 0.94) were satisfactory. The ODI was positively correlated with VAS (r_s = 0.54, P < 0.001) and negatively correlated with all of the SF-36 sections (r_s = − 0.35 to − 0.64, P < 0.001, all), apart from the role-physical (r_s = − 0.02, P = 0.767).

Conclusions

The Croatian version of the ODI has acceptable psychometric properties. It appears to be suitable for assessment of LBP and treatment outcomes in Croatian-speaking patients. Overall, there was no evidence to reject the original unidimensional structure in favor of a two-factor solution. As such, the unidimensional structure should continue to be used in future studies.

Graphical abstract

These slides can be retrieved under Electronic Supplementary Material.

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Title: Validation of the Croatian version of the Oswestry Disability Index
Authors: Ivan Domazet
Jakob Nemir
Petra Barl
Krešimir Saša Đurić
Ivan Pašalić
Hrvoje Barić
Marin Stančić
Publication date: 01-11-2018
Publisher: Springer Berlin Heidelberg
Published in: European Spine Journal / Issue 11/2018
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-018-5757-z

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Validation of the Croatian version of the Oswestry Disability Index

Abstract

Purpose

Methods

Results

Conclusions

Graphical abstract

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Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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