Department of Orthopedic Surgery, Clinical Orthopedic Research Hvidovre (CORH), Copenhagen University Hospital Hvidovre, Copenhagen, Denmark.
Zealand University Hospital, Køge and Aleris-Hamlet Parken, Copenhagen, Denmark.
Knee Surg Sports Traumatol Arthrosc. 2018 Apr;26(4):1204-1209. doi: 10.1007/s00167-017-4594-7. Epub 2017 Jun 23.
The purpose of this study was to investigate the Danish population as a whole from 1994 to 2013 to find the incidence of acute and recurrent patellar dislocation.
The study was performed as a descriptive epidemiological study. The Danish National Patient Registry was retrospectively searched from 1994 to 2013 to find the number of acute and recurrent patellar dislocation. National population data were collected from Statistics Denmark.
The period 1994-2013 saw a total registration of 24,154 primary patellar dislocations. A mean incidence of 42 (95% CI 37-47) per 100,000 person-years at risk was found, and young females aged 10-17 had the highest incidence of 108 (95% CI 101-116). In a 10-year follow-up, patients were at an overall risk of 22.7% (95% CI 22.2-23.2) of suffering a recurrent dislocation, with young girls aged 10-17 experiencing the highest risk, namely 36.8% (95% CI 35.5-38.0). The overall risk of suffering a patellar dislocation in the contralateral knee was 5.8% (95% CI 5.5-6.1) and 11.1% (95% CI 10.4-11.7) for patients aged 10-17.
A high incidence rate of primary patellar dislocation was found both as a mean in the population (42/100,000), and particularly in patients aged 10-17 (108/100,000). The risk of recurrent dislocation in the affected knee (22.7%) and the contralateral knee (5.8%) was high, which could indicate the influence of an underlying pathomorphology. This is relevant knowledge to the clinician, as he/she should be aware of the high risk of recurrent dislocation when deciding on treatment, especially in young patients.
IV.
本研究旨在调查丹麦 1994 年至 2013 年的整个人群，以确定急性和复发性髌骨脱位的发病率。
本研究为描述性流行病学研究。通过对 1994 年至 2013 年的丹麦国家患者登记处进行回顾性检索，以确定急性和复发性髌骨脱位的数量。国家人口数据由丹麦统计局收集。
1994 年至 2013 年期间，共登记原发性髌骨脱位 24154 例。每 10 万人年的发生率为 42（95%可信区间 37-47），10-17 岁的年轻女性发病率最高，为 108（95%可信区间 101-116）。在 10 年的随访中，患者总体上有 22.7%（95%可信区间 22.2-23.2）的风险发生复发性脱位，10-17 岁的年轻女孩风险最高，为 36.8%（95%可信区间 35.5-38.0）。对侧膝关节发生髌骨脱位的总体风险为 5.8%（95%可信区间 5.5-6.1），10-17 岁患者的风险为 11.1%（95%可信区间 10.4-11.7）。
无论是人群平均发病率（42/10 万）还是 10-17 岁患者（108/10 万），原发性髌骨脱位的发病率均较高。患侧膝关节（22.7%）和对侧膝关节（5.8%）的复发性脱位风险较高，这可能表明存在潜在的病理形态学改变。这对于临床医生来说是重要的知识，因为在决定治疗方案时，他/她应该意识到复发性脱位的风险较高，尤其是在年轻患者中。
IV。
