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Two rounds of Delphi surveys were conducted under the predefined criteria for rating, followed by a consensus meeting to finalize the COS for PCC (COS\u2010PCC).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Fifty\u2010two outcomes within 7 categories and 206 measurement methods were identified. Sixty participants from five stakeholder groups completed the first round of the Delphi survey and 41 the second. Consensus was reached among 36 representatives on four domains of respiratory, physical, neuropsychological, and health conditions, including nine core outcomes and their respective measurement methods of priority: dyspnea (modified Medical Research Council scale), cough (Leicester Cough Questionnaire), exercise capacity (6\u2010min walk test), fatigue (Fatigue Severity Scale), pain (Numerical Rating Scale), sleeping disturbance (Pittsburgh Sleep Quality Index), anxiety (Generalized Anxiety Disorder Scale\u20107), depression (Patient Health Questionnaire\u20109), and health status (36\u2010item\u00a0Short\u00a0Form\u00a0Health\u00a0Survey); 16 optional measurement methods achieved consensus for supplement. Measuring phases of each core outcome were prioritized by importance through short and long terms of PCC.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The COS\u2010PCC highlights the key PCC concerns and provides an essential outcome set for PCC assessment in clinical trials and evidence synthesis. With improving the understanding of PCC and accumulating research evidence, the COS\u2010PCC needs to be continuously updated and improved in practice.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jebm.70082","type":"journal-article","created":{"date-parts":[[2025,11,22]],"date-time":"2025-11-22T19:04:56Z","timestamp":1763838296000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A Core Outcome Set for Clinical Trials on Post COVID\u201019 Condition: \u201cWhat,\u201d \u201cWhen,\u201d and \u201cHow\u201d to Measure"],"prefix":"10.1111","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6672-2346","authenticated-orcid":false,"given":"Bo","family":"Pang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese Medicine  Tianjin China"},{"name":"Chinese Core Outcome Sets Research Center  Tianjin China"},{"name":"Evidence\u2010Based Medicine Center Tianjin University of Traditional Chinese Medicine  Tianjin China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keyi","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese Medicine  Tianjin China"},{"name":"Chinese Core Outcome Sets Research Center  Tianjin China"},{"name":"Evidence\u2010Based Medicine Center Tianjin University of Traditional Chinese Medicine  Tianjin China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qingquan","family":"Liu","sequence":"additional","affiliation":[{"name":"General Outpatient Clinic Beijing Hospital of Traditional Chinese Medicine Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhongde","family":"Zhang","sequence":"additional","affiliation":[{"name":"Emergency Department The Second Affiliated Hospital of Guangzhou University of Chinese Medicine Guangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yan","family":"Shi","sequence":"additional","affiliation":[{"name":"Department of TCM Internal Medicine Liaoning University of Traditional Chinese Medicine Shenyang China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6485-2371","authenticated-orcid":false,"given":"Jiansheng","family":"Li","sequence":"additional","affiliation":[{"name":"Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases Co\u2010Constructed by Henan province &amp; Education Ministry of P.R. 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