Sex Differences in Patient-Reported Outcomes After Anterior Cruciate Ligament Reconstruction Data From the Swedish Knee Ligament Register

Background: Female gender is a risk factor for sustaining anterior cruciate ligament (ACL) injury. However, little is known about possible sex differences in patients with ACL injury/reconstruction.Purpose: To study sex differences in patient-reported outcomes before and at 1 and 2 years after ACL reconstruction and to present reference values.Study Design: Cohort study; Level of evidence, 2.Methods: Between 2005 and 2008, 10164 patients (mean age, 27 years; SD, 9.8; 42% females) with primary ACL reconstruction were registered in the Swedish national knee ligament register. There were 4438 (44%) of these patients (42% females) who had completed the knee-specific questionnaire, Knee injury and Osteoarthritis Outcome Score (KOOS), and 5255 (52%) who had completed the generic score of health status, EQ-5D, before surgery and were included in this study. Independent t tests were used to study sex differences in KOOS and EQ-5D preoperatively, 1 and 2 years postoperatively, and over time.Results: Preoperatively...