{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T14:01:10Z","timestamp":1785765670596,"version":"3.56.0"},"reference-count":28,"publisher":"SAGE Publications","issue":"7","license":[{"start":{"date-parts":[[2016,7,1]],"date-time":"2016-07-01T00:00:00Z","timestamp":1467331200000},"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":[[2016,7]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Patella alta describes an abnormally high-riding patella in relationship to the femur and has been shown to correlate with patellofemoral pain, instability, chondromalacia, and arthrosis. Conventional measurements of patella alta involve multiple measurements and are often not defined on cross-sectional imaging as related to radiographs.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis:<\/jats:title>\n                    <jats:p>Patellar articular overlap on sagittal magnetic resonance imaging (MRI) will correlate well with conventional measurements of patella alta as measured by a standardized technique defined by our group.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort study (diagnosis); Level of evidence, 2.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>MRIs of 239 knees were reviewed by 3 attending surgeons with practices focusing on patellofemoral disease, as well as 2 sports medicine fellows and 1 musculoskeletal radiologist. Measurements included articular overlap, percentage of articular coverage, Caton-Deschamps index, Blackburne-Peel index, and modified Insall-Salvati index.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Interrater reliability was high for Caton-Deschamps, Blackburne-Peel, and modified Insall-Salvati indices (intraclass correlation coefficient [ICC], 0.877, 0.828, and 0.787, respectively). Articular overlap and percentage articular coverage correlated well with each other (ICC, 0.961;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001) and with the Caton-Deschamps (overlap\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = \u20130.271,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001; coverage\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = \u20130.131,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .037) and Blackburne-Peel (overlap\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.343,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001; coverage\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = \u20130.238,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001) indices. Articular overlap and percentage coverage failed to correlate with the modified Insall-Salvati index (overlap\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = \u20130.117,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .091; coverage\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.007,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .918).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Patellar articular overlap and percentage of patellar articular coverage show promise as a simpler alternative to conventional, ratio-based measurements of patellar height. Future studies are needed to evaluate the range of normal and the relationship to our traditionally used measurements.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/2325967116656328","type":"journal-article","created":{"date-parts":[[2016,7,12]],"date-time":"2016-07-12T03:50:03Z","timestamp":1468295403000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":49,"title":["Patellar Articular Overlap on MRI Is a Simple Alternative to Conventional Measurements of Patellar Height"],"prefix":"10.1177","volume":"4","author":[{"given":"Jacqueline L.","family":"Munch","sequence":"first","affiliation":[{"name":"Oregon Health and Science University, Portland, Oregon, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jaron P.","family":"Sullivan","sequence":"additional","affiliation":[{"name":"Vanderbilt University, Nashville, Tennessee, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph T.","family":"Nguyen","sequence":"additional","affiliation":[{"name":"Hospital for Special Surgery, New York, New York, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Douglas","family":"Mintz","sequence":"additional","affiliation":[{"name":"Hospital for Special Surgery, New York, New York, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel W.","family":"Green","sequence":"additional","affiliation":[{"name":"Hospital for Special Surgery, New York, New York, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beth E.","family":"Shubin Stein","sequence":"additional","affiliation":[{"name":"Hospital for Special Surgery, New York, New York, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabrina","family":"Strickland","sequence":"additional","affiliation":[{"name":"Hospital for Special Surgery, New York, New York, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2016,7,8]]},"reference":[{"key":"e_1_3_2_2_2","first-page":"578","article-title":"Patella alta and gonarthrosis","volume":"19","author":"Ahlback S","year":"1978","unstructured":"Ahlback S, Mattsson S. 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