Translation and cross‐cultural adaptation to Spanish of the Anterior Cruciate Ligament Return to Sport after Injury Scale (SP ACL‑RSI): Measurement properties and responsiveness in a multisport sample

Abstract Purpose The aim was to translate and adapt The Anterior Cruciate Ligament Return to Sport after Injury Scale (ACL‐RSI) to Spanish and provide evidence of its psychometric properties and responsiveness in a both sexes multisport sample. Methods ACL‐RSI Spanish version (SP ACL‐RSI) was obtained by forward‐back‐translation method. Internal consistency, test‐retest reliability, construct validity and responsiveness were assessed. Standardized response mean (SRM), smallest detectable change (SDC) and minimally important change (MIC) were obtained by anchor‐based method. The sample consisted of n = 132 multisport patients who underwent ACL‐RSI. Sixty‐seven patients (Group A) completed test‐retest of the SP ACL‐RSI within 15 days and 65 patients (Group B) fulfilled SP ACL‐RSI, the Tampa Scale of Kinesiophobia (TSK‐11), the International Knee Documentation Committee‐Subjective Knee Form (IKDC‐SF 2000), the Knee Osteoarthritis Outcome Score (KOOS) preoperative, 6 and 12 months. Results The SP ACL‐RSI shows satisfactory internal consistency (Cronbach's α = 0.95) and test–retest reliability (ICC = 0.92), with acceptable floor (9%) and ceiling (6%) effects. Convergent validity was supported with moderate positive correlations with KOOS and IKDC‐SF 2000 dimensions, and a negative correlation with the TSK (p