Translation and Validation of the Bulgarian Version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in Patients with Osteoarthritis

Authors

  • Svetoslav A. Slavchev Department of Orthopaedics and Traumatology, Medical University – Sofia, Bulgaria

DOI:

https://doi.org/10.7546/CRABS.2023.03.15

Keywords:

KOOS, Bulgarian version, translation

Abstract

The Knee Injury and Osteoarthritis Outcome Score (KOOS) is one of the valid and reliable tools for patient-reported assessment of the knee joint in cases of injury or osteoarthritis, before or after knee replacement. The aim of this study was to evaluate the validity and reliability of the Bulgarian version of the KOOS questionnaire. First, the original English version was translated into Bulgarian, back-translated, and pilot-tested for clarity and acceptance. Then the Bulgarian version of the questionnaire was administered to 77 patients with osteoarthritis of the knee and some of them completed it again within a week. Internal consistency, test-retest reliability, and construct validity were assessed through Cronbach's alpha, Intraclass correlation coefficient, and correlation with the WOMAC questionnaire, respectively. Minimum Cronbach's alpha level of 0.7 was exceeded by all five subscales of the KOOS. Minimum ICC of 0.7 was exceeded by four of the subscales and the fifth had moderate ICC of 0.57. High correlation with the WOMAC score was found in four subscales and the fifth showed moderate correlation. The results suggest that the Bulgarian version of the KOOS is valid and reliable for use in Bulgarian patients with osteoarthritis of the knee.

Author Biography

Svetoslav A. Slavchev, Department of Orthopaedics and Traumatology, Medical University – Sofia, Bulgaria

Mailing Address:
Department of Orthopaedics and Traumatology,
Medical University – Sofia
1 St. Georgi Sofiiski St
1431 Sofia, Bulgaria

E-mail: s.slavchev@medfac.mu-sofia.bg

 

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Published

27-03-2023

How to Cite

[1]
S. Slavchev, “Translation and Validation of the Bulgarian Version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in Patients with Osteoarthritis”, C. R. Acad. Bulg. Sci. , vol. 76, no. 3, pp. 457–463, Mar. 2023.

Issue

Section

Medicine