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Published in: Knee Surgery, Sports Traumatology, Arthroscopy 12/2023

29-09-2023 | Osteoarthrosis | KNEE

Cross-cultural adaptation and validation of the KOOS, JR questionnaire for assessing knee osteoarthritis in Spanish-speaking patients

Authors: Rodrigo Guiloff, Magaly Iñiguez, Tomás Prado, Francisco Figueroa, Nicolás Olavarría, Eduardo Carrasco, Enrique Ergas, Martín Salgado, Stephen Lyman

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 12/2023

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Abstract

Purpose

The present study aims to translate, adapt and validate a Spanish version of the Knee Injury and Osteoarthritis Outcome Score, Joint Replacement (KOOS, JR), including a reliability and validity analysis in patients with knee osteoarthritis (OA).

Methods

This study conducted a prospective validation study following the six stages of the “Guidelines for the Process of Cross-Cultural Adaptation of Self-Report Measures”. Psychometric testing was conducted in patients with knee osteoarthritis. Subjects answered the Spanish KOOS, JR (S-KOOS, JR) and a validated Spanish Oxford Knee Score (S-OKS). Retest was conducted at 10 days. Acceptability, floor and ceiling effect, internal consistency (Cronbach’s α), reproducibility (mixed-effect model coefficient [MEMC]) and construct validity (Spearman’s correlation; p = 0.05) were assessed.

Results

Forty-one patients (mean age: 65.6 ± 5.39; 48.8% female) participated in the study. All patients (100%) answered both scores during the first assessment and 38 (92.7%) during the second assessment. All patient-reported outcomes measures were answered completely (100%). The S-KOOS, JR resulted in 100% acceptability when answered. There were no ceiling or floor effects detected. The Cronbach’s α for the S-KOOS, JR was 0.927 and its MEMC was 0.852 (CI 95% 0.636–1.078). The Spearman’s correlation between the S-KOOS, JR and the S-OKS was 0.711 (CI 0.345–0.608; p < 0.001) and 0.870 (CI 0.444–0.651; p < 0.001) for the first and second assessments, respectively.

Conclusion

The S-KOOS, JR has very high internal consistency and reproducibility, with a high correlation with the S-OKS; it is a reliable and valid instrument for characterising Spanish-speaking patients suffering from knee OA.

Level of evidence

IV.
Appendix
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Metadata
Title
Cross-cultural adaptation and validation of the KOOS, JR questionnaire for assessing knee osteoarthritis in Spanish-speaking patients
Authors
Rodrigo Guiloff
Magaly Iñiguez
Tomás Prado
Francisco Figueroa
Nicolás Olavarría
Eduardo Carrasco
Enrique Ergas
Martín Salgado
Stephen Lyman
Publication date
29-09-2023
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 12/2023
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-023-07577-8

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