PMID- 37286052 OWN - NLM STAT- MEDLINE DCOM- 20231120 LR - 20240213 IS - 1532-8406 (Electronic) IS - 0883-5403 (Linking) VI - 38 IP - 12 DP - 2023 Dec TI - Establishing the Minimal Clinically Important Difference and Patient Acceptable Symptomatic State following Patellofemoral Inlay Arthroplasty for Visual Analog Scale Pain, Western Ontario and McMaster Universities Arthritis Index, and Lysholm Scores. PG - 2580-2586 LID - S0883-5403(23)00626-5 [pii] LID - 10.1016/j.arth.2023.05.084 [doi] AB - BACKGROUND: The purposes of the study were to define the minimal clinically important difference (MCID) and patient acceptable symptomatic state (PASS) after patello-femoral inlay arthroplasty (PFA) and to identify factors predictive for the achievement of clinically important outcomes (CIOs). METHODS: A total of 99 patients who underwent PFA between 2009 and 2019 and had a minimum of 2-year postoperative follow-up were enrolled in this retrospective monocentric study. Included patients had a mean age of 44 years (range, 21 to 79). The MCID and PASS were calculated using an anchor-based approach for the visual analog scale (VAS) pain, Western Ontario and McMaster Universities Arthritis Index (WOMAC), and Lysholm patient-reported outcome measures. Factors associated with CIO achievement were determined using multivariable logistic regression analyses. RESULTS: The established MCID thresholds for clinical improvement were -2.46 for the VAS pain score, -8.5 for the WOMAC score, and + 25.4 for the Lysholm score. Postoperative scores corresponding to the PASS were <2.55 for the VAS pain score, <14.6 for the WOMAC score, and >52.5 points for the Lysholm score. Preoperative patellar instability and concomitant medial patello-femoral ligament reconstruction were independent positive predictors of reaching both MCID and PASS. Additionally, inferior baseline scores and age were predictive of achieving MCID, whereas superior baseline scores and body mass index were predictive of achieving PASS. CONCLUSION: This study determined the thresholds of MCID and PASS for the VAS pain, WOMAC, and Lysholm scores following PFA implantation at 2-year follow-up. The study demonstrated a predictive role of patient age, body mass index, preoperative patient-reported outcome measure scores, preoperative patellar instability, and concomitant medial patello-femoral ligament reconstruction in the achievement of CIOs. LEVEL OF EVIDENCE: Prognostic Level IV. CI - Copyright (c) 2023 Elsevier Inc. All rights reserved. FAU - Rupp, Marco-Christopher AU - Rupp MC AD - Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany. FAU - Khan, Zeeshan A AU - Khan ZA AD - Midwest Orthopaedics at Rush, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois. FAU - Dasari, Suhas P AU - Dasari SP AD - Midwest Orthopaedics at Rush, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois. FAU - Berthold, Daniel P AU - Berthold DP AD - Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany; Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Munich, Germany. FAU - Siebenlist, Sebastian AU - Siebenlist S AD - Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany. FAU - Imhoff, Andreas B AU - Imhoff AB AD - Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany. FAU - Chahla, Jorge AU - Chahla J AD - Midwest Orthopaedics at Rush, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois. FAU - Pogorzelski, Jonas AU - Pogorzelski J AD - Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany. LA - eng PT - Journal Article DEP - 20230605 PL - United States TA - J Arthroplasty JT - The Journal of arthroplasty JID - 8703515 SB - IM MH - Humans MH - Adult MH - Treatment Outcome MH - Retrospective Studies MH - Minimal Clinically Important Difference MH - Visual Analog Scale MH - Ontario MH - *Joint Instability MH - Universities MH - *Patellofemoral Joint/surgery MH - Arthroplasty MH - Pain/etiology MH - Patient Reported Outcome Measures OTO - NOTNLM OT - patello-femoral OT - patello-femoral arthroplasty OT - patello-femoral osteoarthritis OT - patello-femoral resurfacing OT - retropatellar resurfacing EDAT- 2023/06/08 01:08 MHDA- 2023/11/20 06:54 CRDT- 2023/06/07 19:26 PHST- 2022/10/03 00:00 [received] PHST- 2023/05/26 00:00 [revised] PHST- 2023/05/29 00:00 [accepted] PHST- 2023/11/20 06:54 [medline] PHST- 2023/06/08 01:08 [pubmed] PHST- 2023/06/07 19:26 [entrez] AID - S0883-5403(23)00626-5 [pii] AID - 10.1016/j.arth.2023.05.084 [doi] PST - ppublish SO - J Arthroplasty. 2023 Dec;38(12):2580-2586. doi: 10.1016/j.arth.2023.05.084. Epub 2023 Jun 5.