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New approach for measuring the angle of hallux valgus

机译：测量拇外翻角度的新方法

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Background: Since only the medium correlation between current anthropometric and radiographic way in measuring angle of hallux valgus (AoH) was reported, this study first aimed at designing a new way to measure the AoH (AoH_(new)) and then evaluating its reliability and validity. Method: Fifteen ages-, body weight-and height-matched male students were recruited and those with foot disorders, deformities or injuries were excluded. The dorsal protrusion of the first metatarsal head (MTH) and base (MTB) and hallux were marked by palpating from one experienced observer. Then their barefoot model in standing was collected by a three dimensional laser scanning system. The AoH_(new) was defined in X-Y plane as the angle between the line joining the marks of MTH and MTB and the line connecting the marks of MTH and hallux. Another session was measured one week later. Other measures based on the way of footprint, outline and radiography were also available for comparisons. Paired-T test, linear regression and reliability analysis were applied for statistical analysis with significant level of 0.05 and 95% confidence interval. The results show that no significant differences were recorded between the new method and radiographic way (p=0.069). The AoH_(new) was superior to the methods of foot print and outline and it presented a relative higher linear correlation coefficiency (r=0.94, r2=0.89) with radiographic way. Moreover the result of new method was proved to be reliable (CoV=9.2%, ICC =0.940). Conclusion: This new method could be used for hallux valgus inspection and diagnosis.
机译：背景：由于仅报道了当前人体测量学与放射线照相法在测量拇外翻角度（AoH）之间的中等相关性，因此本研究首先旨在设计一种测量AoH（AoH_（new））的新方法，然后评估其可靠性和可靠性。有效性。方法：招募十五名年龄，体重和身高相匹配的男学生，排除那些患有脚部疾病，畸形或受伤的学生。一位经验丰富的观察者触诊了第一meta骨头（MTH），基部（MTB）和拇指的背突。然后通过三维激光扫描系统收集他们站立时的赤脚模型。在X-Y平面中将AoH_（新）定义为连接MTH和MTB标记的线与连接MTH和拇指的标记的线之间的角度。一周后测量了另一节。还可以使用基于足迹，轮廓和射线照相方式的其他度量进行比较。采用配对T检验，线性回归和可靠性分析进行统计学分析，显着性水平为0.05，置信区间为95％。结果表明，新方法与射线照相方式之间未发现明显差异（p = 0.069）。 AoH_（new）优于脚印和轮廓线方法，并且通过射线照相方式显示出相对较高的线性相关系数（r = 0.94，r2 = 0.89）。此外，新方法的结果被证明是可靠的（CoV = 9.2％，ICC = 0.940）。结论：该新方法可用于拇外翻检查和诊断。

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