Children are participating in sports at an increasingly younger age, which has contributed to an increased incidence of knee injuries among this population. Because of increased interest in the application of patient-reported outcome measures in orthopaedic surgery to evaluate treatment results, numerous knee outcome scores, including the International Knee Documentation Committee Subjective Form (IKDC), have been used to evaluate the knee. Although the IKDC has been validated only in adults, it is also being used for children because of a lack of appropriate outcome scores in the pediatric population. To address this concern, a pediatric version of the IKDC (Pedi-IKDC) was developed and evaluated for reliability, validity, and responsiveness. However, normative data for the Pedi-IKDC have not been established.