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| Cross-cultural adaptation and validation of the Moroccan version of the Knee injury and Osteoarthritis Outcome Score (KOOS) in knee osteoarthritis patients
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Angéla Filankembo, Nada Otmani,Nessrine Akasbi, P. Conde,K. EL Kinany, A. Chrifi Alaoui, M. Atassi, N. Tachfouti, M. Berraho, T. Harzy, S. EL Fakir
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Abstract:
Introduction: The KOOS (Knee injury and osteoarthitis outcome score) is a scale used to assess the impact of the knee injuries. The original version was developed in English. The aim of our study was to adapt and validate the KOOS, in the Moroccan Arabic dialect, and to assess its psychometric properties. Method: A cross-sectional study design was employed. The cross-cultural adaptation was performed according to published recommendations. The study was conducted in center of Hassan II hospital in Fez. The sample size was defined according to Streiner curve[1] for an ICC of 0.70 and a precision of 0.10. Result: A total of 98 subjects were included in the study. The mean age of subjects was 53.3 years (SD=16), mostly male (53.1%) and generally without educational levels (30.9%). The overall Cronbach alpha of 0.95 indicated adequate internal consistency. The ICC between two interviewers, ranged from 0.90 for "QOL" to 0.97 for "ADL". The test-retest reliability was assessed using the ICC, which ranged from 0.85 for "pain" to 0.97 for "ADL "and "QOL". The ADL, Sport/Rec and QOL exhibited 100% item-convergence (r: 0.69-0.86; 0.84-0.93and 0.84-0.93, respectively) and 100% item-discriminance (r : 0.19-0.68, 0.24-0.74 and 0.30-0.54, respectively).SF-36 bodily pain was highly correlated with the KOOS subscale Pain and QOL. Conclusion: The Moroccan version of the KOOS disease specific questionnaire offers psychometrics properties that make it valid and reliable instrument for patients with various knee pathologies in particular to assess quality of life subscale.
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