The alpha angle in cam-type femoroacetabular impingement
The alpha angle in cam-type femoroacetabular impingement
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DOI：
10.1302/0301-620x.96b4.32194
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发表时间：
2014-04-01
影响因子：
4.6
通讯作者：
Rosendahl, K.
中科院分区：
文献类型：
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作者：
Laborie, L. B.;Lehmann, T. G.;Rosendahl, K.
我们报告了一项基于人群的队列研究，该队列包括2038名19岁的青少年，其中1186名为女性（58%），研究对象为不同性别的α角参考区间及其与其他定性凸轮型髋关节股骨髋臼撞击症的相关性。使用数字测量软件在标准化蛙腿侧位和前后位（AP）视图上测量α角，并由独立观察者在两个视图上主观评估定性凸轮型结果。共有2005名参与者（837名男性，1168名女性，平均年龄18.6岁（17.2至20.1岁））被纳入分析。对于蛙腿视图，男性和女性的平均α角（右髋）分别为47度（26 - 79）和42度（29 - 76），分别为68度和56度的97.5度。对于AP视图，男性和女性的平均值分别为62度（40至105度）和52度（36至103度），93度和94度分别为97.5度。在两种视图上，在两种性别中均观察到较高α角与所有定性凸轮型结果之间的关联。在本横断面研究中，α角的参考区间较宽，尤其是AP视图，男性在两个视图上的平均值均高于女性。
We report on gender-specific reference intervals of the alpha angle and its association with other qualitative cam-type findings in femoroacetabular impingement at the hip, according to a population-based cohort of 2038 19-year-olds, 1186 of which were women (58%). The alpha angle was measured on standardised frog-leg lateral and anteroposterior (AP) views using digital measurement software, and qualitative cam-type findings were assessed subjectively on both views by independent observers. In all, 2005 participants (837 men, 1168 women, mean age 18.6 years (17.2 to 20.1) were included in the analysis. For the frog-leg view, the mean alpha angle (right hip) was 47 degrees (26 to 79) in men and 42 degrees (29 to 76) in women, with 97.5 percentiles of 68 degrees and 56 degrees, respectively. For the AP view, the mean values were 62 degrees (40 to 105) and 52 degrees (36 to 103) for men and women, respectively, with 97.5 percentiles of 93 degrees and 94 degrees. Associations between higher alpha angles and all qualitative cam-type findings were seen for both genders on both views. The reference intervals presented for the alpha angle in this cross-sectional study are wide, especially for the AP view, with higher mean values for men than women on both views.