Reconstruction of the Anterior Cruciate Ligament(ACL-R) in the 30+-Year Old Assessed by Patient Reported Outcome Measures(PRO) Using the Nationwide Danish Knee Ligament Reconstruction Registry

The purpose of the study is to evaluate the efficacy of primary ACL-R in patients 30 years of age or older using PRO. The PRO used are Knee Osteoarthritis Outcome Score(KOOS) and Tegner score. The Danish Knee Ligament Reconstruction Registry has data including more than 31,000 primary ACL-R performed in the period from 2005 to 2018, of which approximately a little less than 40% are performed in patients 30 years or older. Traditionally, ACL-R has been used for the active, younger patients with the purpose of returning to their pre-injury level of activity. The increasing activity level and the desire to stay active among some patients in their fourth decade, and later, possibly increases the demands of the reconstructed ACL in this group. The aim is to investigate the PRO in this group of patients and compare them with the PRO of patients younger than 30 years of age. The study may help orthopedic surgeons counselling patients 30 years of age or older when deciding to perform an ACL-R. The study's hypothesis is, that the overall benefit from ACL-R is equal but the patients 30 years of age or older has a worse baseline and as an implication of that worse PRO one year after the ACL-R.