{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T22:56:01Z","timestamp":1788908161099,"version":"build-2803163510"},"reference-count":31,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2025,1,13]],"date-time":"2025-01-13T00:00:00Z","timestamp":1736726400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["European Journal of Pain"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>After lumbar spine surgery, a Core Outcome Set (COS) for acute pain is essential to ensure that the most meaningful outcomes are monitored consistently in the perioperative period. The aim of the present study was to consent on a COS for assessing the efficacy of acute pain management for patients undergoing lumbar spinal surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>A modified Delphi procedure was conducted among a national (Dutch) expert panel. External endorsement of the final COS was conducted among an international panel of anaesthesiologists and the Dutch chronic pain patient association.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A panel of 35 experts representing 10 stakeholder groups, including orthopaedic surgeons, anaesthesiologists, patient representatives, physician assistants, researchers, a neurosurgeon, nurses, and a psychologist, took part in the Delphi procedure. Five outcome domains reached consensus for inclusion in this COS. This COS contains the following domains: pain intensity, analgesic use, early mobilisation, length of stay, and adverse events. Of an international panel of 27 key opinion leaders, 77% agreed on the final COS. The patient association also consented to the final COS.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>A COS to evaluate acute pain treatment after lumbar surgery is proposed after national Delphi consensus rounds and (international) external endorsement. Future research should focus on determining suitable measurement instruments, assessing feasibility, validation, and implementation of the COS in daily clinical practice and research.<\/jats:p><\/jats:sec><jats:sec><jats:title>Significance<\/jats:title><jats:p>This research proposes a clinically relevant spine\u2010specific core outcome set (COS) of domains focusing on the acute postoperative phase (until 30\u2009days). This is the first COS for evaluation of acute pain after lumbar spine surgery.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ejp.4784","type":"journal-article","created":{"date-parts":[[2025,1,13]],"date-time":"2025-01-13T22:05:22Z","timestamp":1736805922000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Development of a Core Outcome Set of Domains to Evaluate Acute Pain Treatment After Lumbar Spine Surgery: A Modified Delphi Study"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2657-4294","authenticated-orcid":false,"given":"Ilse H.","family":"van de Wijgert","sequence":"first","affiliation":[{"name":"Department of Anesthesiology Sint Maartenskliniek  Nijmegen The Netherlands"},{"name":"Department of Anesthesiology, Pain and Palliative Medicine Radboud University Medical Center  Nijmegen The Netherlands"},{"name":"Department of Research Sint Maartenskliniek  Nijmegen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2919-6356","authenticated-orcid":false,"given":"Kris C. 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