{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T03:29:55Z","timestamp":1791430195830,"version":"4.3.3"},"reference-count":30,"publisher":"BMJ","issue":"9","funder":[{"DOI":"10.13039\/501100013826","name":"Candys Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100013826","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Reg Anesth Pain Med"],"accepted":{"date-parts":[[2024,5,28]]},"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:sec>\n                  <jats:title>Background and objectives<\/jats:title>\n                  <jats:p>Pain catastrophizing is associated with acute pain after total knee arthroplasty. However, the association between pain catastrophizing and acute pain after unicompartmental knee arthroplasty (UKA) remains unclear.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>We investigated the incidence of predicted high-pain and low-pain responders, based on a preoperative Pain Catastrophizing Scale score &gt;20\u2009or \u226420, respectively, and the acute postoperative pain course in both groups. Patients undergoing UKA were consecutively included in this prospective observational cohort study. Pain at rest and during walking (5\u2009m walk test) was evaluated preoperatively, at 24\u2009hours postoperatively, and on days 2\u20137 using a pain diary.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>125\u2009patients were included, with 101 completing the pain diary. The incidence of predicted high-pain responders was 31% (95% CI 23% to 40%). The incidence of moderate to severe pain during walking at 24\u2009hours postoperatively was 69% (95% CI 52% to 83%) in predicted high-pain responders and 66% (95% CI 55% to 76%) in predicted low-pain responders; OR 1.3 (95% CI 0.5 to 3.1). The incidence of moderate to severe pain at rest 24\u2009hours postoperatively was 49% (95% CI 32% to 65%) in predicted high-pain responders and 28% (95% CI 19% to 39%) in predicted low-pain responders; OR 2.6 (95% CI 1.1 to 6.1; p=0.03). Pain catastrophizing was not associated with increased cumulated pain during walking on days 2\u20137.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>The incidence of predicted high-pain responders in UKA was slightly lower than reported in total knee arthroplasty. Additionally, preoperative pain catastrophizing was not associated with acute postoperative pain during walking.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/rapm-2024-105503","type":"journal-article","created":{"date-parts":[[2024,6,5]],"date-time":"2024-06-05T22:00:19Z","timestamp":1717624819000},"page":"706-711","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":4,"title":["Acute postoperative pain and catastrophizing in unicompartmental knee arthroplasty: a prospective, observational, single-center, cohort study"],"prefix":"10.1136","volume":"50","clinical-trial-number":[{"clinical-trial-number":"nct05510947","registry":"10.18810\/clinical-trials-gov"}],"author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2203-7050","authenticated-orcid":false,"given":"Anders Holten","family":"Springborg","sequence":"first","affiliation":[{"name":"Department of Anesthesiology, Hvidovre Hospital, Hvidovre, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian Bredgaard","family":"Jensen","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Hvidovre Hospital, Hvidovre, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kirill","family":"Gromov","sequence":"additional","affiliation":[{"name":"Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark"},{"name":"Department of Orthopaedics, Hvidovre Hospital, Hvidovre, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders","family":"Troelsen","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Hvidovre Hospital, Hvidovre, Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Henrik","family":"Kehlet","sequence":"additional","affiliation":[{"name":"Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark"},{"name":"Section of Surgical Pathophysiology, Rigshospitalet, Copenahagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolai Bang","family":"Foss","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology, Hvidovre Hospital, Hvidovre, Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2024,6,5]]},"reference":[{"key":"2025101112524714000_50.9.706.1","first-page":"246","article-title":"Champions in usage of medial unicompartmental knee arthroplasty: the story behind the Danish success","volume":"53","author":"Elkj\u00e6r Christensen","year":"2024","journal-title":"Orthopadie (Heidelb)"},{"key":"2025101112524714000_50.9.706.2","doi-asserted-by":"crossref","first-page":"390","DOI":"10.2340\/17453674.2022.2265","article-title":"Optimized medial unicompartmental knee arthroplasty outcome: learning from 20 years of propensity score matched registry data","volume":"93","author":"Mikkelsen","year":"2022","journal-title":"Acta Orthop"},{"key":"2025101112524714000_50.9.706.3","doi-asserted-by":"crossref","DOI":"10.1136\/bmj.l352","article-title":"Patient relevant outcomes of unicompartmental versus total knee replacement: systematic review and meta-analysis","volume":"364","author":"Wilson","year":"2019","journal-title":"BMJ"},{"key":"2025101112524714000_50.9.706.4","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.97B6.35155"},{"key":"2025101112524714000_50.9.706.5","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2016.11.034"},{"key":"2025101112524714000_50.9.706.6","doi-asserted-by":"crossref","first-page":"955","DOI":"10.1016\/j.otsr.2018.02.015","article-title":"Fewer complications after UKA than TKA in patients over 85 years of age: a case-control study","volume":"104","author":"Ode","year":"2018","journal-title":"Orthop Traumatol Surg Res"},{"key":"2025101112524714000_50.9.706.7","doi-asserted-by":"crossref","first-page":"1617","DOI":"10.1016\/j.arth.2019.04.004","article-title":"Unicondylar knee arthroplasty has fewer complications but higher revision rates than total knee arthroplasty in a study of large United States databases","volume":"34","author":"Hansen","year":"2019","journal-title":"J Arthroplasty"},{"key":"2025101112524714000_50.9.706.8","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(19)31281-4"},{"key":"2025101112524714000_50.9.706.9","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.2106\/JBJS.20.01287","article-title":"Length of stay and 90-day readmission\/complication rates in Unicompartmental versus total knee arthroplasty: a propensity-score-matched study of 10,494 procedures performed in a fast-track setup","volume":"103","author":"Jensen","year":"2021","journal-title":"J Bone Joint Surg 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