Translation and testing of measurement properties of the Swedish version of the IKDC subjective knee form

To translate to Swedish language and cross‐culturally adapt the IKDC‐SKF and to test the measurement properties of the Swedish version of IKDC‐SKF in ACL‐injured patients undergoing reconstruction surgery.The translation and cross‐cultural adaption was performed according to guidelines. Seventy‐six patients with an ACL injury filled out the IKDC‐SKF and other questionnaires before ACL reconstruction and at 4, 6, and 12 months after surgery. A total of 203 patients from the Swedish ACL Registry participated at 8 months post‐operative. Measurement properties were tested according to the COnsensus‐based Standards for the selection of health Measurement INstruments (COSMIN) guidelines.The Swedish IKDC‐SKF had high internal consistency (Cronbach′s alpha=0.90) and test‐retest reliability (ICC2,1=0.92, CI 95%: 0.81‐0.97, P