John A. Feagin Jr Sports Medicine Fellowship, Department of Orthopedic Surgery, Keller Army Hospital, West Point, New York 10996, USA.
Am J Sports Med. 2010 Oct;38(10):1997-2004. doi: 10.1177/0363546510371423. Epub 2010 Jul 8.
Although some studies have reported an increased incidence of patellar dislocations within active populations, few studies have reported incidence rates and examined risk factors for this injury.
To examine the incidence of patellar dislocation injuries and the influence of demographic and occupational risk factors associated with injury among active-duty United States (US) service members between 1998 and 2007.
Cohort study; Level of evidence, 3.
Using the Defense Medical Surveillance System, a search was performed for International Classification of Disease, 9th Revision (ICD-9) code 836.3 among all US service members on active duty during the study period. Multivariable Poisson regression analysis was used to estimate the rate of patellar dislocation per 1000 person-years at risk to injury. Incidence rates (IRs) and incidence rate ratios (IRRs) for patellar dislocation along with 95% confidence intervals (CIs) were estimated by gender, age, race, branch of military service, and rank while controlling for the other variables in the model.
There were a total of 9299 individuals with documented patellar dislocation injuries among a population at risk of 13 443 448 person-years. The IR was 0.69 per 1000 person-years at risk. Women were 61% more likely (IRR, 1.61; 95% CI, 1.53-1.69) to sustain a patellar dislocation injury than men. Rates were highest in the youngest age group and decreased with increasing age. Service members aged <20 years were 84% more likely (IRR, 1.84; 95% CI, 1.61-2.10) to sustain a patellar dislocation injury as service members aged ≥40 years. Differences were also noted by race, service, and rank.
The incidence of patellar dislocation injuries among US service members was an order of magnitude greater than that previously reported in civilian population studies. Gender, age, race, rank, and branch of military service are important risk factors related to the incidence of patellar dislocation injuries in this population.
尽管一些研究报告称活跃人群中髌骨脱位的发生率增加，但很少有研究报告发病率并检查与该损伤相关的危险因素。
检查 1998 年至 2007 年间现役美国（US）军人髌骨脱位损伤的发生率，以及与损伤相关的人口统计学和职业危险因素的影响。
队列研究；证据水平，3。
使用国防医疗监测系统，在研究期间对所有现役美军中使用国际疾病分类，第 9 版（ICD-9）代码 836.3 进行了搜索。使用多变量泊松回归分析来估计每 1000 人-年受伤的髌骨脱位率。通过性别、年龄、种族、军种和军衔来估计髌骨脱位的发病率（IR）和发病率比（IRR），同时控制模型中其他变量。
在 13443448 人-年的风险人群中，共有 9299 人记录有髌骨脱位损伤。IR 为 0.69/1000 人-年。女性比男性更容易发生髌骨脱位损伤（IRR，1.61；95%CI，1.53-1.69），风险增加 61%。年龄最小的人群发生率最高，随着年龄的增加而降低。年龄<20 岁的军人比年龄≥40 岁的军人更容易发生髌骨脱位损伤（IRR，1.84；95%CI，1.61-2.10）。种族、军种和军衔也存在差异。
与之前在平民人群研究中报告的髌骨脱位损伤发生率相比，美国军人的发生率要高一个数量级。性别、年龄、种族、军衔和军种是该人群髌骨脱位损伤发生率的重要危险因素。
