PMID- 36592696 OWN - NLM STAT- MEDLINE DCOM- 20230508 LR - 20230511 IS - 1526-3231 (Electronic) IS - 0749-8063 (Linking) VI - 39 IP - 6 DP - 2023 Jun TI - Minimal Clinically Important Differences for Oxford, Constant, and University of California Los Angeles Shoulder Scores After Reverse Shoulder Arthroplasty to Allow Interpretation of Patient-Reported Outcome Measures and Future Statistical Power Analyses. PG - 1405-1414 LID - S0749-8063(22)00866-0 [pii] LID - 10.1016/j.arthro.2022.12.027 [doi] AB - PURPOSE: To determine the minimal clinically important difference (MCID) for the Constant-Murley Score (CMS), University of California Los Angeles (UCLA) Shoulder Score, and Oxford Shoulder Score (OSS) after reverse shoulder arthroplasty. METHODS: Patients were prospectively followed up between January 2011 and February 2020. Inclusion criteria was that of patients who underwent reverse shoulder arthroplasty for massive irreparable cuff tear, cuff tear arthropathy, and fractures, with and without previous cuff repair, by a fellowship-trained surgeon. Patients were assessed preoperatively and at 3, 6, and 12 months' postoperatively. Functional outcome was assessed by the CMS, UCLA Shoulder Score, and OSS and the respective MCIDs were determined using simple linear regression in consonance with patient satisfaction and expectation fulfilment. RESULTS: A total of 131 patients were followed up for 12 months. The MCIDs at 3 months for CMS, UCLA Shoulder Score, and OSS were 7.2, 3.3, and 6.9, respectively. At 6 months, the MCIDs for CMS, UCLA Shoulder Score, and OSS were 6.6, 2.4, and 4.7, respectively. At 12 months, the MCIDs for CMS, UCLA Shoulder Score, and OSS were 9.3, 2.9, and 6.6, respectively. CONCLUSIONS: CMS, UCLA Shoulder Score, and OSS are valid scores to calculate MCID after reverse shoulder arthroplasty, and the MCID established in this study can be used for the interpretation of these scores to help in statistical power analysis for future studies. LEVEL OF EVIDENCE: III, retrospective cohort study. CI - Copyright (c) 2022 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved. FAU - Zhou, Allan AU - Zhou A AD - Department of Orthopedic Surgery, Singapore General Hospital, Singapore. Electronic address: allan.zhou@mohh.com.sg. FAU - Xu, Sheng AU - Xu S AD - Department of Orthopedic Surgery, Singapore General Hospital, Singapore. FAU - Yew, Khye Soon Andy AU - Yew KSA AD - Department of Orthopedic Surgery, Singapore General Hospital, Singapore. FAU - Lie, Denny Tijauw Tjoen AU - Lie DTT AD - Department of Orthopedic Surgery, Singapore General Hospital, Singapore. LA - eng PT - Journal Article DEP - 20221230 PL - United States TA - Arthroscopy JT - Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association JID - 8506498 SB - IM MH - Humans MH - Shoulder/surgery MH - *Shoulder Joint/surgery MH - *Arthroplasty, Replacement, Shoulder MH - Retrospective Studies MH - *Rotator Cuff Injuries/surgery MH - Minimal Clinically Important Difference MH - Los Angeles MH - Treatment Outcome MH - Patient Reported Outcome Measures MH - Range of Motion, Articular EDAT- 2023/01/03 06:00 MHDA- 2023/05/08 10:17 CRDT- 2023/01/02 19:13 PHST- 2022/03/19 00:00 [received] PHST- 2022/12/05 00:00 [revised] PHST- 2022/12/15 00:00 [accepted] PHST- 2023/05/08 10:17 [medline] PHST- 2023/01/03 06:00 [pubmed] PHST- 2023/01/02 19:13 [entrez] AID - S0749-8063(22)00866-0 [pii] AID - 10.1016/j.arthro.2022.12.027 [doi] PST - ppublish SO - Arthroscopy. 2023 Jun;39(6):1405-1414. doi: 10.1016/j.arthro.2022.12.027. Epub 2022 Dec 30.