Perry Lim, Marcos Gonzalez, Hany Bedair, Christopher M Melnic
{"title":"Risk Factors and Thresholds for Minimal Clinically Important Difference in Worsening after Unicompartmental Knee Arthroplasty.","authors":"Perry Lim, Marcos Gonzalez, Hany Bedair, Christopher M Melnic","doi":"10.1055/a-2555-1941","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>The rising demand for unicompartmental knee arthroplasty (UKA) in the United States has led to high one-year patient satisfaction rates. However, some patients experience substantial declines in patient-reported outcome measures (PROMs) post-operatively, which we refer to as \"Minimal Clinically Importance Difference for Worsening \" (MCID-W). We sought to define MCID-W values for specific PROMs and identify risk factors associated with PROMIS Physical Function Short Form 10a (PROMIS PF-10a) declines after UKA.</p><p><strong>Methods: </strong>We conducted a retrospective study of 760 patients undergoing UKA at our institution between 2016 and 2023. Preoperative and postoperative PROMIS PF-10a, PROMIS Global Physical, and Knee injury and Osteoarthritis Outcome Score-Physical Function Short-form (KOOS-PS) scores were collected. Patients were stratified upon reaching Minimal Clinically Importance Difference for Improvement (MCID-I), MCID-W, or \"no significant change\" (score between MCID-W and MCID-I). MCID-W and MCID-I values were determined using a distribution-based method. Logistic regression was performed to identify risk factors for scoring below MCID-W.</p><p><strong>Results: </strong>We established the following MCID-I and MCID-W thresholds: PROMIS PF-10a (+3.00 and -1.64), KOOS-PS (+6.25 and -3.42), and PROMIS Global-Physical (+2.72 and -1.55). Bivariate analysis revealed differences in terms revision (P=0.02), reoperation (P=0.03), postoperative complications (P=0.002), deep venous thrombosis (DVT) (P<.001), and pneumonia (P=0.01) between cohorts. Body mass index >35 (odds ratio [OR]=2.49), postoperative complications (OR=5.09), pneumonia (OR=22.39), DVT (OR=9.27), and pre-operative PROMIS PF-10a scores (OR=1.07) were risk factors for scoring below the MCID-W threshold, whereas age > 80 (OR=2.89) and pre-operative PROMIS PF-10a scores (OR=1.05) were risk factors for failing to achieve MCID-I.</p><p><strong>Conclusion: </strong>Our study established MCID-W values for pivotal PROMs after primary UKAs. We found that 8.8% of patients scored below MCID-W, highlighting the need to improve patient selection and perioperative care in UKA.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Knee Surgery","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1055/a-2555-1941","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ORTHOPEDICS","Score":null,"Total":0}
Risk Factors and Thresholds for Minimal Clinically Important Difference in Worsening after Unicompartmental Knee Arthroplasty.
Background: The rising demand for unicompartmental knee arthroplasty (UKA) in the United States has led to high one-year patient satisfaction rates. However, some patients experience substantial declines in patient-reported outcome measures (PROMs) post-operatively, which we refer to as "Minimal Clinically Importance Difference for Worsening " (MCID-W). We sought to define MCID-W values for specific PROMs and identify risk factors associated with PROMIS Physical Function Short Form 10a (PROMIS PF-10a) declines after UKA.
Methods: We conducted a retrospective study of 760 patients undergoing UKA at our institution between 2016 and 2023. Preoperative and postoperative PROMIS PF-10a, PROMIS Global Physical, and Knee injury and Osteoarthritis Outcome Score-Physical Function Short-form (KOOS-PS) scores were collected. Patients were stratified upon reaching Minimal Clinically Importance Difference for Improvement (MCID-I), MCID-W, or "no significant change" (score between MCID-W and MCID-I). MCID-W and MCID-I values were determined using a distribution-based method. Logistic regression was performed to identify risk factors for scoring below MCID-W.
Results: We established the following MCID-I and MCID-W thresholds: PROMIS PF-10a (+3.00 and -1.64), KOOS-PS (+6.25 and -3.42), and PROMIS Global-Physical (+2.72 and -1.55). Bivariate analysis revealed differences in terms revision (P=0.02), reoperation (P=0.03), postoperative complications (P=0.002), deep venous thrombosis (DVT) (P<.001), and pneumonia (P=0.01) between cohorts. Body mass index >35 (odds ratio [OR]=2.49), postoperative complications (OR=5.09), pneumonia (OR=22.39), DVT (OR=9.27), and pre-operative PROMIS PF-10a scores (OR=1.07) were risk factors for scoring below the MCID-W threshold, whereas age > 80 (OR=2.89) and pre-operative PROMIS PF-10a scores (OR=1.05) were risk factors for failing to achieve MCID-I.
Conclusion: Our study established MCID-W values for pivotal PROMs after primary UKAs. We found that 8.8% of patients scored below MCID-W, highlighting the need to improve patient selection and perioperative care in UKA.
期刊介绍:
The Journal of Knee Surgery covers a range of issues relating to the orthopaedic techniques of arthroscopy, arthroplasty, and reconstructive surgery of the knee joint. In addition to original peer-review articles, this periodical provides details on emerging surgical techniques, as well as reviews and special focus sections. Topics of interest include cruciate ligament repair and reconstruction, bone grafting, cartilage regeneration, and magnetic resonance imaging.