• Gareth N Hill and Sean T O'Leary.
• Department of Trauma and Orthopaedics, Royal Berkshire Hospital NHS Foundation Trust, London Road, Reading, Berkshire, RG1 5AN, UK. garethhill@doctors.org.uk
• Knee Surg Sports Traumatol Arthrosc. 2013 Aug 1; 21 (8): 1889-94.

PurposeThe use of patient reported outcome measures has gained increasing prominence in reporting surgical outcomes following primary anterior cruciate ligament reconstruction (ACLR). Many peer-reviewed journals now require 'end-result' outcomes in excess of 24 months following surgery for publication. As such, there is less focus on early recovery when the greatest rate of change is experienced and when key rehabilitation decisions are made relating to restricted activity and return to sports. We sought to examine the early recovery profile of patients following primary ACLR, determine the presence of any plateau effect of recovery and establish a source of reference for future study.MethodOne hundred and sixty-five patients undergoing primary ACLR were identified from a prospective database. The Knee Injury and Osteoarthritis Outcome Score (KOOS) was recorded pre-operatively and at the 3-, 6- and 12-month follow-up reviews. Mean scores were developed to plot a standard 'recovery profile' of statistical analysis for the presence of any plateau effect.ResultsThere were significant improvements in all mean KOOS domains at 12 months following ACLR (P < 0.001) and between each recording point (P < 0.003), discounting any plateau effect. Rates of graft rupture and other surgical complications were low (1.2 and 1.8 %). The recovery profile of mean KOOS scores illustrated a reduced rate of recovery over time with sports/recreation and knee-related quality of life KOOS domains demonstrating the greatest sensitivity to change.ConclusionsThis study profiles the early recovery of patients following primary ACLR using the KOOS demonstrating continued recovery of function throughout the full first 12 months with no evidence of a plateau effect. The early results in ACLR have not previously been reported in a study of this size and provide important data upon which key rehabilitation decisions can be based.Level Of EvidenceTherapeutic study-case series with no comparison group, Level IV.

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