Validation of the German version of the Kujala score in patients with patellofemoral instability : a prospective multi-centre study
Dammerer, D., Liebensteiner, M., Kujala, U., Emmanuel, K., Kopf, S., Dirisamer, F., & Giesinger, J. M. (2018). Validation of the German version of the Kujala score in patients with patellofemoral instability : a prospective multi-centre study. Archives of Orthopaedic and Trauma Surgery, 138(4), 527-535. https://doi.org/10.1007/s00402-018-2881-5
Published inArchives of Orthopaedic and Trauma Surgery
Kopf, S. |
© The Author(s) 2018
Introduction: The Kujala score is the most frequently used questionnaire for patellofemoral disorders like pain, instability or osteoarthritis. Unfortunately, we are not aware of a validated German version of the Kujala score. The aim of our study was the translation and linguistic validation of the Kujala score in German-speaking patients with patella instability and the assessment of its measurement characteristics. Materials and methods: The German Kujala score was developed in several steps of translation. In addition to healthy controls, the Kujala German was assessed in consecutive patients undergoing reconstruction of the medial patellofemoral ligament for recurrent patellar dislocations. Pre-op, 6 and 12 months postop the patients completed the Kujala German score, the KOOS, the Lysholm score, a VAS Pain, and the SF-12v2 scores. In addition, there was a Kujala German Score retest preop after a 1-week interval. Results: We found high reliability in terms of internal consistency for the Kujala score (Cronbach’s alpha = 0.87). Convergent validity with the KOOS (symptom r = 0.65, pain r = 0.78, ADL r = 0.74, sports/recreation r = 0.84, quality of life r = 0.70), the Lysholm score (r = 0.88) and the SF-12 physical component summary score (r = 0.79) and VAS pain (r = − 0.71) was also very high. Discriminant validity in terms of correlation with the SF-12 mental component summary Score was satisfactory (r = 0.14). Conclusions: In conclusion, the German version of the Kujala score proved to be a reliable and valid instrument in the setting of a typical patellofemoral disease treated with a standard patellofemoral procedure. ...
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