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Title: Cross-cultural adaptation of a German version of the Oswestry Disability Index and evaluation of its measurement properties.
Author: Osthus H, Cziske R, Jacobi E.
Journal: Spine (Phila Pa 1976); 2006 Jun 15; 31(14):E448-53. PubMed ID: 16778674.
Abstract:
STUDY DESIGN: Psychometric testing of a translated, culturally adapted questionnaire. OBJECTIVES: Cross-cultural adaptation of a German version of the Oswestry Disability Index (ODI) and evaluation of its measurement properties. SUMMARY OF BACKGROUND DATA: The ODI, one of the most popular questionnaires for chronic low back pain (LBP), has been valid, reliable, and responsive. Recently, a Swiss version of the ODI has been published, but there is no validated version for Germany to date. METHODS: The translated and adapted German version of the ODI (ODI-G) was validated in inpatients with chronic LBP during 3 weeks' medical rehabilitation care. The ODI-G was completed at admission, 1 day later, and at discharge. Comparison with both a generic and chronic LBP-specific measure (the SF-36 and Hannover Functional Ability Questionnaire) assessed criterion validity. RESULTS: A very high level of test-retest-reliability was found (r = 0.91). Criterion validity showed high correlations between the ODI-G on 1 side, and the SF-36 and Hannover Functional Ability Questionnaire on the other. Standardized response means showed significant changes when health status improved (1.38) or deteriorated (1.35). CONCLUSIONS: The ODI-G is valid, reliable, and responsive. It may be used to measure current state as well as changes in health status, and allows for cross-cultural comparisons. Further research comparing the 2 versions in German language seems to be necessary.

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