{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,16]],"date-time":"2026-05-16T07:28:45Z","timestamp":1778916525466,"version":"3.51.4"},"reference-count":36,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Journal of Sports Medicine"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Patient-reported outcome measures (PROMs) are essential for assessing knee function; however, their complexity can hinder efficiency. The subjective knee value (SKV) offers a simple alternative, but lacks distinction between daily activities and sports.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>We propose the SKV for daily activity (SKV-d) and sport (SKV-s). This study aimed to validate the SKV-d and SKV-s as simple and accurate tools for assessing knee function.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort Study (Diagnosis); Level of evidence, 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>A total of 79 consecutive athletic patients (mean age, 39 years; 49% women) with knee-related issues were included and categorized into 4 groups between September and November 2024. PROMs were collected according to clinic standards: knee osteoarthritis (n = 21), Knee Society Clinical Rating System (KSS) (Knee Score and KSS Function), anterior cruciate ligament injury (n = 19), International Knee Documentation Committee subjective knee evaluation form (IKDC-S), patellar instability (n = 12), Kujala Anterior Knee Pain Scale (AKPS), and focal cartilage lesion or isolated meniscal tear (n = 27). Patients completed the SKV, SKV-d, and SKV-s, along with the validated scores mentioned above. Validity, reliability, floor\/ceiling effects, and differences among the 3 single-item scores were assessed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      The SKV-s correlated strongly with the AKPS (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.71), moderately with the IKDC-S (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.64) and the KSS Knee Score (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.45), and weakly with the KSS Function (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.28). The SKV-d correlated moderately with the IKDC-S (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.65) and the AKPS (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.50), and weakly with the KSS Knee Score (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.15) and the KSS Function (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.22). The SKV strongly correlated with the SKV-s (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.83) and the SKV-d (\n                      <jats:italic toggle=\"yes\">rs<\/jats:italic>\n                      = 0.81). The SKV-s was significantly lower than the SKV (46.8 \u00b1 27.8 vs 66 \u00b1 20.7;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001) and the SKV-d (46.8 \u00b1 27.8 vs 73.7 \u00b1 23.3;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001). The SKV-d was higher than the SKV (73.7 \u00b1 23.3 vs 66 \u00b1 20.7;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001). Reliability was good for the SKV (intraclass correlation coefficient [ICC], 0.80), the SKV-s (ICC, 0.86), and the SKV-d (ICC, 0.81), with no significant floor\/ceiling effects except for the SKV-d.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>The SKV-d and SKV-s demonstrated acceptable validity with the SKV, the IKDC-S, and the AKPS, and were reliable, with significant differences between each other and the SKV. Both the SKV-d and the SKV-s may help distinguish between daily activities and sports and for assessing knee function in athletes; however, they should not replace commonly used PROMs.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/23259671251398496","type":"journal-article","created":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T22:19:26Z","timestamp":1767392366000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Introducing the Subjective Knee Value for Daily Activity (SKV\u2013d) and Sport (SKV\u2013s) as Single-Item Measures to Assess Knee Function in Athletes"],"prefix":"10.1177","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1928-5021","authenticated-orcid":false,"given":"Georgios","family":"Neopoulos","sequence":"first","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jan","family":"Orlewski","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexandros","family":"Tsolakidis","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carmen","family":"Castroviejo","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8128-3927","authenticated-orcid":false,"given":"Lukas","family":"Jud","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lazaros","family":"Vlachopoulos","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sandro F.","family":"Fucentese","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1892-6624","authenticated-orcid":false,"given":"Stefan M","family":"Zimmermann","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, University Hospital of Balgrist, Zurich, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2026,1,2]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/acr.20632"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2007.02.005"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-018-2881-5"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2023.07.056"},{"issue":"5","key":"e_1_3_3_6_2","doi-asserted-by":"crossref","DOI":"10.1177\/23259671221094056","article-title":"Are patient-reported outcome scores a reasonable substitute for clinical follow-up after surgically managed acromioclavicular joint injuries?","volume":"10","author":"Dey Hazra RO","year":"2022","unstructured":"Dey Hazra RO, Blach RM, Ziert Y, et al. 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