Relationship Between Sports Participation After Revision Anterior Cruciate Ligament Reconstruction and 2-Year Patient-Reported Outcome Measures
Authors:   MARS Group, Bigouette John P. , Owen Erin C. , Lantz Brett (Brick) A. , Hoellrich Rudolf G. , Huston Laura J. , Haas Amanda K. , Allen Christina R. , Anderson Allen F. , Cooper Daniel E. , DeBerardino Thomas M. , Dunn Warren R. , Mann Barton , Spindler Kurt P. , Stuart Michael J. , Wright Rick W. , Albright John P. , Amendola Annunziato (Ned) , Andrish Jack T. , Annunziata Christopher C. , Arciero Robert A. , Bach Bernard R. , Baker Champ L. , Bartolozzi Arthur R. , Baumgarten Keith M. , Bechler Jeffery R. , Berg Jeffrey H. , Bernas Geoffrey A. , Brockmeier Stephen F. , Brophy Robert H. , Bush-Joseph Charles A. , Butler J. Brad , Campbell John D. , Carey James L. , Carpenter James E. , Cole Brian J. , Cooper Jonathan M. , Cox Charles L. , Creighton R. Alexander , Dahm Diane L. , David Tal S. , Flanigan David C. , Frederick Robert W. , Ganley Theodore J. , Garofoli Elizabeth A. , Gatt Charles J. , Gecha Steven R. , Giffin James Robert , Hame Sharon L. , Hannafin Jo A. , Harner Christopher D. , Harris Norman Lindsay , Hechtman Keith S. , Hershman Elliott B. , Hosea Timothy M. , Johnson David C. , Johnson Timothy S. , Jones Morgan H. , Kaeding Christopher C. , Kamath Ganesh V. , Klootwyk Thomas E. , Levy Bruce A. , Ma C. Benjamin , Maiers G. Peter , Marx Robert G. , Matava Matthew J. , Mathien Gregory M. , McAllister David R. , McCarty Eric C. , McCormack Robert G. , Miller Bruce S. , Nissen Carl W. , O’Neill Daniel F. , Owens Brett D. , Parker Richard D. , Purnell Mark L. , Ramappa Arun J. , Rauh Michael A. , Rettig Arthur C. , Sekiya Jon K. , Shea Kevin G. , Sherman Orrin H. , Slauterbeck James R. , Smith Matthew V. , Spang Jeffrey T. , Svoboda Steven J. , Taft Timothy N. , Tenuta Joachim J. , Tingstad Edwin M. , Vidal Armando F. , Viskontas Darius G. , White Richard A. , Williams James S. , Wolcott Michelle L. , Wolf Brian R. , York James J. 
Published: June 2019

Background: Anterior cruciate ligament (ACL) revision cohorts continually report lower outcome scores on validated knee questionnaires than primary ACL cohorts at similar time points after surgery. It is unclear how these outcomes are associated with physical activity after physician clearance for return to recreational or competitive sports after ACL revision surgery. Hypotheses: Participants who return to either multiple sports or a singular sport after revision ACL surgery will report decreased knee symptoms, increased activity level, and improved knee function as measured by validated patient-reported outcome measures (PROMs) and compared with no sports participation. Multisport participation as compared with singular sport participation will result in similar increased PROMs and activity level. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 1205 patients who underwent revision ACL reconstruction were enrolled by 83 surgeons at 52 clinical sites. At the time of revision, baseline data collected included the following: demographics, surgical characteristics, previous knee treatment and PROMs, the International Knee Documentation Committee (IKDC) questionnaire, Marx activity score, Knee injury and Osteoarthritis Outcome Score (KOOS), and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). A series of multivariate regression models were used to evaluate the association of IKDC, KOOS, WOMAC, and Marx Activity Rating Scale scores at 2 years after revision surgery by sports participation category, controlling for known significant covariates. Results: Two-year follow-up was obtained on 82% (986 of 1205) of the original cohort. Patients who reported not participating in sports after revision surgery had lower median PROMs both at baseline and at 2 years as compared with patients who participated in either a single sport or multiple sports. Significant differences were found in the change of scores among groups on the IKDC ( P < .0001), KOOS-Symptoms ( P = .01), KOOS–Sports and Recreation ( P = .04), and KOOS–Quality of Life ( P < .0001). Patients with no sports participation were 2.0 to 5.7 times more likely than multiple-sport participants to report significantly lower PROMs, depending on the specific outcome measure assessed, and 1.8 to 3.8 times more likely than single-sport participants (except for WOMAC-Stiffness, P = .18), after controlling for known covariates. Conclusion: Participation in either a single sport or multiple sports in the 2 years after ACL revision surgery was found to be significantly associated with higher PROMs across multiple validated self-reported assessment tools. During follow-up appointments, surgeons should continue to expect that patients who report returning to physical activity after surgery will self-report better functional outcomes, regardless of baseline activity levels.