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There were no relevant between-group differences in the three patient-reported outcomes: adjusted absolute mean differences (APM vs placebo surgery), \u22121.7 (95% CI \u22127.7 to 4.3) in WOMET, \u22122.1 (95% CI \u22126.8 to 2.6) in Lysholm knee score, and \u22120.04 (95% CI \u22120.81 to 0.72) in knee pain after exercise, respectively. The corresponding adjusted absolute risk difference in the presence of mechanical symptoms was 18% (95% CI 5% to 31%); there were more symptoms reported in the APM group. All other secondary outcomes comparisons were similar.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>APM was associated with a slightly increased risk of developing radiographic knee osteoarthritis and no concomitant benefit in patient-relevant outcomes, at 5 years after surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Trial registration<\/jats:title><jats:p>ClinicalTrials.gov (<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"clintrialgov\" xlink:href=\"NCT01052233\">NCT01052233<\/jats:ext-link>and<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"clintrialgov\" xlink:href=\"NCT00549172\">NCT00549172<\/jats:ext-link>).<\/jats:p><\/jats:sec>","DOI":"10.1136\/bjsports-2020-102813","type":"journal-article","created":{"date-parts":[[2020,8,27]],"date-time":"2020-08-27T22:04:14Z","timestamp":1598565854000},"page":"1332-1339","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":118,"title":["Arthroscopic partial meniscectomy for a degenerative meniscus tear: a 5 year follow-up of the placebo-surgery controlled FIDELITY (Finnish Degenerative Meniscus Lesion Study) trial"],"prefix":"10.1136","volume":"54","clinical-trial-number":[{"clinical-trial-number":"nct01052233","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct00549172","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct01052233","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct00549172","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct01052233","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct00549172","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"Raine","family":"Sihvonen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mika","family":"Paavola","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antti","family":"Malmivaara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ari","family":"It\u00e4l\u00e4","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antti","family":"Joukainen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juha","family":"Kalske","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heikki","family":"Nurmi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jaanika","family":"Kumm","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Niko","family":"Sillanp\u00e4\u00e4","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tommi","family":"Kiekara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aleksandra","family":"Turkiewicz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pirjo","family":"Toivonen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Englund","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6755-2983","authenticated-orcid":false,"given":"Simo","family":"Taimela","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3713-956X","authenticated-orcid":false,"given":"Teppo 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