Fear of Reinjury Following Surgical and Nonsurgical Management of Anterior Cruciate Ligament Injury: An Exploratory Analysis of the NACOX Multicenter Longitudinal Cohort Study.

"Disclosures The authors completed the ICMJE Form for Disclosure of Potential Conflicts of Interest and reported no conflicts of interest."

"Funding The NACOX Study is funded by the Swedish Medical Research Council (VR 2015-03687), the Swedish Research Council for Sport Science (CIF P2016-0063 and P2017-0151), the Medical Research Council of Southeast Sweden FORSS (FORSS-662081), and the Medical Faculty at Linkoping University, Sweden. S. Filbay is funded by a National Health and Medical Research Council (NHMRC) Emerging Leadership Fellowship (#1194428)."

"This is an exploratory analysis of data from the Natural Corollaries and Recovery After ACL-injury (NACOX) Study (trial registration number NCT02931084), a multicenter longitudinal prognostic cohort study designed to investigate the effects of ACL injury managed with usual care in Sweden. This study was approved by the Swedish Ethical Review Authority (Dnr 2016/44-31 and 2017/221–32). Clinical Trial Registration: This study is an exploratory analysis of data from the Natural Corollaries and Recovery After ACL-injury (NACOX) Study (NCT02931084)."