Translation, cross-cultural adaptation, reliability, validity, and responsiveness of the Brazilian Portuguese version of the Knee Injury and Osteoarthritis Outcome Score for Children (KOOS-Child) in children and adolescents with knee injuries

Key Points

• To translate and validate the KOOS-Child for Brazilian Portuguese-speaking children and adolescents with knee injuries.
• Translation and cross-cultural adaptation of the KOOS-Child questionnaire
• Assessment of reliability via test-retest
• Evaluation of validity through comparison with other relevant measures
• Analysis of responsiveness to changes over time in knee injury severity
• KOOS-Child-Br shows high reliability scores
• Validates effectively with other established measures
• Proven responsive to changes in knee injury status