Details

Autor(en) / Beteiligte

• Fithian, Donald C.
• Paxton, Elizabeth W.
• Stone, Mary Lou
• Silva, Patricia
• Davis, Daniel K.
• Elias, David A.
• White, Lawrence M.

Titel

Epidemiology and Natural History of Acute Patellar Dislocation

Ist Teil von

• The American journal of sports medicine, 2004-07, Vol.32 (5), p.1114-1121

Ort / Verlag

Los Angeles, CA: American Orthopaedic Society for Sports Medicine

Erscheinungsjahr

2004

Quelle

MEDLINE

Beschreibungen/Notizen

• Background: 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. Study Design: Prospective cohort study. Methods: 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. Results: 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 <.05) and were older than first-time dislocation patients ( P <.05). Fewer first-time dislocators (17%) had episodes of instability during follow-up than patients with a previous history of instability (49%) ( P <.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 <.001). Conclusions: 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. Keywords: acute patellar dislocation prospective outcome natural history risk factors