{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T13:06:23Z","timestamp":1784898383826,"version":"3.55.0"},"reference-count":22,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T00:00:00Z","timestamp":1783900800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T00:00:00Z","timestamp":1784851200000},"content-version":"vor","delay-in-days":11,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100008769","name":"Julius-Maximilians-Universit\u00e4t W\u00fcrzburg","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100008769","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["BMC Musculoskelet Disord"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Patient-reported outcome measures (PROMs) are widely used to evaluate subjective knee function after cartilage repair surgery, but their association with objective functional performance is unclear. This study explored correlations between PROMs and functional performance tests in patients after knee cartilage repair.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>In this monocentric observational study, 52 patients from the German Cartilage Registry underwent standardized functional testing at a mean follow-up of 66.8 months. PROMs included the subjective IKDC score and KOOS subscales. Functional performance comprised isometric strength testing, single-leg hop tests (SLHD), Timed Up and Go (TUG), Timed 6-Meter Hop (T6H), 30-second Sit-to-Stand, and Single Leg Stance. Spearman correlations were calculated between PROMs and limb symmetry indices or performance categories.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Dynamic unilateral hop tests showed the strongest associations with PROMs, with SLHD symmetry correlating strongly with IKDC (\u03c1 = 0.540) and moderately with all KOOS subscales. T6H performance also correlated strongly with IKDC and KOOS Sport. Knee extension strength showed moderate correlations with IKDC and KOOS Sport, whereas flexion strength and low-demand tests (TUG, Single Leg Stance) showed no significant associations.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>PROMs demonstrate moderate, test-dependent correlations with objective functional performance after knee cartilage repair, particularly for dynamic unilateral tasks. PROMs reflect functional impairment but cannot replace objective testing. Therefore, a combined assessment approach is recommended.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12891-026-10123-5","type":"journal-article","created":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T07:25:19Z","timestamp":1783927519000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Beyond patient perception: PROMs correlate with objective functional tests following knee cartilage repair"],"prefix":"10.1186","volume":"27","author":[{"given":"Niklas","family":"Wegerich","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tizian","family":"Heinz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sebastian","family":"Frischholz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annette","family":"Eidmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ioannis","family":"Stratos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Konstantin","family":"Horas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephan","family":"Reppenhagen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maximilian","family":"Rudert","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manuel","family":"Wei\u00dfenberger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,13]]},"reference":[{"issue":"2","key":"10123_CR1","doi-asserted-by":"publisher","first-page":"231","DOI":"10.1177\/0363546509352157","volume":"38","author":"S Heir","year":"2010","unstructured":"Heir S, Nerhus TK, R\u00f8tterud JH, L\u00f8ken S, Ekeland A, Engebretsen L, et al. 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The registry is publicly registered at germanctr.de under the ID DRKS00005617 (registration date 03\/01\/2014). Retrospectively registered. Primary ethical approval was granted by the Ethics Committee of the University of Freiburg (Approval No. 520\/14, April 5th 2017), with additional approval for data registration provided by the local Ethics Committee of the University of W\u00fcrzburg (Approval No. 333\/15, June 4th 2018). Informed consent was obtained from all participating individuals.","order":1,"name":"Ethics","label":"Ethics approval and consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable. No individual participant data, images, or other identifying information are included in this manuscript.","order":2,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"633"}}