Prevalence of Cam-Type Deformity on Hip Magnetic Resonance Imaging in Young Males: A Cross-Sectional Study
Prevalence of Cam-Type Deformity on Hip Magnetic Resonance Imaging in Young Males: A Cross-Sectional Study
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DOI：
10.1002/acr.20198
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发表时间：
2010-09-01
影响因子：
4.7
通讯作者：
Leunig, Michael
中科院分区：
文献类型：
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作者：
Reichenbach, Stephan;Jueni, Peter;Leunig, Michael
Objective.确定年轻男性髋关节磁共振成像（MRI）中凸轮型畸形的患病率。方法。这是一项基于人群的横断面研究，在接受临床检查并完成自我报告问卷的年轻无症状男性个体中进行。随机抽样的参与者被邀请进行髋关节MRI检查。我们使用0 - 3级对桡骨序列上股骨头-颈连接处的最大偏心距进行分级，其中0 =正常，1 =可能，2 =明确，3 =严重畸形。预先规定的主要分析基于明确的凸轮型畸形2级或3级。我们估计了凸轮型畸形的患病率，并根据整体抽样过程和内旋程度进行了调整。然后我们在放射状MRI序列上确定畸形的位置。共有1，080例受试者入选研究，244例平均年龄为19.9岁的无症状男性接受了MRI检查。检测到67例明确的凸轮型畸形。调整后的总体患病率为24%（95%置信区间[95%CI] 19-30%）。患病率随着内旋的减少而增加（趋势P < 0.001）。在临床上内旋减少< 30的患者中，估计患病率为48%（95%CI 37-59%）。67例凸轮型畸形中有61例位于前上方。在MRI上，每四个无症状的年轻男性个体和每两个内旋减少的男性个体中就有一个可以发现凸轮型畸形。大多数畸形位于前上方位置。
Objective. To determine the prevalence of cam-type deformities on hip magnetic resonance imaging (MRI) in young males.Methods. This was a population-based cross-sectional study in young asymptomatic male individuals who underwent clinical examination and completed a self-report questionnaire. A random sample of participants was invited for MRI of the hip. We graded the maximal offset at the femoral head-neck junction on radial sequences using grades from 0 to 3, where 0 = normal, 1 = possible, 2 = definite, and 3 = severe deformity. The prespecified main analyses were based on definite cam-type deformity grades 2 or 3. We estimated the prevalence of the cam-type deformity adjusted for the sampling process overall and according to the extent of internal rotation. Then we determined the location of the deformity on radial MRI sequences.Results. A total of 1,080 subjects were included in the study and 244 asymptomatic males with a mean age of 19.9 years attended MRI. Sixty-seven definite cam-type deformities were detected. The adjusted overall prevalence was 24% (95% confidence interval [95% CI] 19-30%). The prevalence increased with decreasing internal rotation (P < 0.001 for trend). Among those with a clinically decreased internal rotation of < 30, the estimated prevalence was 48% (95% CI 37-59%). Sixty-one of 67 cam-type deformities were located in an anterosuperior position.Conclusion. Cam-type deformities can be found on MRI in every fourth young asymptomatic male individual and in every second male with decreased internal rotation. The majority of deformities are located in an anterosuperior position.