{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,4]],"date-time":"2026-11-04T03:47:05Z","timestamp":1793764025962,"version":"4.6.1"},"reference-count":60,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2004,7,1]],"date-time":"2004-07-01T00:00:00Z","timestamp":1088640000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[2004,7]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>The goals of this study were to (1) define the epidemiology of acute patellar dislocation, (2) determine the risk of subsequent patellar instability episodes (subluxation and\/or redislocation) during the study period, and (3) identify risk factors for subsequent instability episodes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design<\/jats:title>\n                    <jats:p>Prospective cohort study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The authors prospectively followed 189 patients for a period of 2 to 5 years. Historical data, injury mechanisms, and physical and radiographic measurements were recorded to identify potential risk factors for poor outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Risk was highest among females 10 to 17 years old. Patients presenting with a prior history of instability were more likely to be female (P &lt; .05) and were older than first-time dislocation patients (P &lt; .05). Fewer first-time dislocators (17%) had episodes of instability during follow-up than patients with a previous history of instability (49%) (P &lt; .01). After adjusting for demographics, patients with a prior history had 7 times higher odds of subsequent instability episodes during follow-up than first time dislocators (adjusted odds ratio = 6.6, P &lt; .001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Patellar dislocators who present with a history of patellofemoral instability are more likely to be female, are older, and have greater risk of subsequent patellar instability episodes than first-time patellar dislocators. Risk of recurrent patellar instability episodes in either knee is much higher in this group than in first-time dislocators.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0363546503260788","type":"journal-article","created":{"date-parts":[[2004,5,24]],"date-time":"2004-05-24T20:23:28Z","timestamp":1085430208000},"page":"1114-1121","source":"Crossref","is-referenced-by-count":1069,"title":["Epidemiology and Natural History of Acute Patellar Dislocation"],"prefix":"10.1177","volume":"32","author":[{"given":"Donald C.","family":"Fithian","sequence":"first","affiliation":[{"name":"Southern California Permanente Medical Group, San Diego, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth W.","family":"Paxton","sequence":"additional","affiliation":[{"name":"Southern California Permanente Medical Group, San Diego, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mary 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