Mahakkanukrauh Pasuk, Praneatpolgrang Sithee, Ruengdit Sitthiporn, Singsuwan Phruksachat, Duangto Phuwadon, Case D Troy
Department of Anatomy, Faculty of Medicine, Chiang Mai University, 50120, Thailand.
Department of Anatomy, Faculty of Medical Science, Payao University, Payao 56000, Thailand.
Forensic Sci Int. 2014 Jul;240:152.e1-8. doi: 10.1016/j.forsciint.2014.04.001. Epub 2014 Apr 13.
Previous research on sex estimation from the tarsals has shown that the talus is the most sexually dimorphic tarsal bone in most populations. In order to assess the sexing potential of the talus in a Thai population, 252 skeletons (126 male, 126 female) from the Chiang Mai University Skeletal Collection were measured. The sample represents Thai people who come from the local Chiang Mai area and who died within the past ten years. Ten measurements were taken on the left and right tali from each skeleton. Seven of these measurements are similar, or identical, to measurements used by other researchers. Three experimental measurements were also taken. Logistic regression equations were calculated for each measurement, and for pairs of measurements. The individual measurements were also examined using ROC analysis. Averaging the results from both sides, the individual measurements with the highest correct allocation accuracies based on logistic regression analysis were trochlear length (88.2%), trochlear breadth (87.3%), talar length (85.5%), and inferior articular surface length (84.5%). The ROC results followed a similar pattern, with Area Under the Curve values as follows: trochlear length (0.952), inferior articular surface length (0.937), trochlear breadth (0.935), and talar length (0.914). When pairs of measurements were considered by means of logistic regression, four equations produced predicted allocation accuracies greater than 90% - three from the right talus, and one from the left. The highest accuracy on both sides resulted from a combination of the two most sexually dimorphic individual measurements of trochlear length and trochlear breadth. Together, they produced predicted allocation accuracies of 91.3% on the right side, and 91.4% on the left side. Unlike many past studies that have found talar length to be the most sexually dimorphic measurement of the talus, our study found trochlear length and breadth to be the most accurate measurements for distinguishing the sexes. Researchers developing sexing equations for use with other populations should consider including trochlear length and breadth in their analyses.
先前有关从跗骨进行性别估计的研究表明，距骨是大多数人群中最具性别二态性的跗骨。为了评估距骨在泰国人群中的性别鉴定潜力，对清迈大学骨骼收藏中的252具骨骼（126具男性，126具女性）进行了测量。该样本代表来自清迈当地地区且在过去十年内死亡的泰国人。对每具骨骼的左右距骨进行了十项测量。其中七项测量与其他研究人员使用的测量方法相似或相同。还进行了三项实验性测量。为每项测量以及测量对计算了逻辑回归方程。还使用ROC分析对各项测量进行了检验。将两侧结果进行平均，基于逻辑回归分析得出正确分配准确率最高的单项测量分别是滑车长度（88.2%）、滑车宽度（87.3%）、距骨长度（85.5%）和下关节面长度（84.5%）。ROC结果呈现类似模式，曲线下面积值如下：滑车长度（0.952）、下关节面长度（0.937）、滑车宽度（0.935）和距骨长度（0.914）。当通过逻辑回归考虑测量对时，四个方程产生的预测分配准确率超过90%——三个来自右侧距骨，一个来自左侧。两侧准确率最高的是滑车长度和滑车宽度这两项最具性别二态性的单项测量的组合。它们共同产生的右侧预测分配准确率为91.3%，左侧为91.4%。与许多过去发现距骨长度是距骨最具性别二态性测量指标的研究不同，我们的研究发现滑车长度和宽度是区分性别的最准确测量指标。为其他人群开发性别鉴定方程的研究人员应考虑在分析中纳入滑车长度和宽度。
