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Reliability, validity and responsiveness of the Spanish version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in patients with chondral lesion of the knee

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

The purpose of this study was to perform a cross-cultural adaptation of the Knee Injury and Osteoarthritis Outcome Score (KOOS) into Spanish and to evaluate the psychometric properties of this version in patients with chondral lesion of the knee, as expressed by its validity, reliability and responsiveness.

Methods

The translation followed an established forward–backward translation procedure with independent translations and counter-translation, according to the recommendations for the cross-cultural adaptation of HRQL measures. Twenty Spanish-speaking patients who underwent arthroscopic surgery for knee cartilage defects with a microfracture technique were enroled in the study. Diagnosis was made based on clinical criteria and radiological confirmation through magnetic resonance imaging. Patients showing signs of instability, axial malalignment or generalised knee osteoarthritis were excluded from the study.

Results

Cronbach’s alpha value for the study of the questionnaire was >0.7 in all the KOOS domains except for Symptoms domain. The test–retest reliability was confirmed with an ICC value greater than 0.8 in all the KOOS domains. A significant agreement between the KOOS domains and the scales of the SF-36 with related content, particularly in the areas of physical function and pain, was observed.

Conclusion

Spanish KOOS questionnaire is valid, reliable and responsive for use in Spanish patients with symptomatic chondral lesion of the knee receiving surgical intervention.

Level of evidence

IV.

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Correspondence to Francisco Forriol.

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Vaquero, J., Longo, U.G., Forriol, F. et al. Reliability, validity and responsiveness of the Spanish version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in patients with chondral lesion of the knee. Knee Surg Sports Traumatol Arthrosc 22, 104–108 (2014). https://doi.org/10.1007/s00167-012-2290-1

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