Mohd Ali Siti Hanum, Omar Normaliza, Shafie Mohamed Swarhib, Nik Ismail Nik Azuan, Hadi Helmi, Nor Faridah Mohd
Forensic Unit, Department of Pathology, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.
Department of Basic Medical Science I, Faculty of Medicine and Health Sciences, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia.
Anat Cell Biol. 2020 Mar;53(1):27-35. doi: 10.5115/acb.19.135. Epub 2020 Mar 12.
Research in forensic anthropology is recent in Malaysia due to limited access to documented skeletal collections. However, advanced imaging techniques provide virtual bone samples for use in morphometric studies to establish population-specific standards by virtual anthropology. This study examined sexual dimorphism in the subpubic angle using a three-dimensional computed tomography model of the pelvis, in a contemporary Malaysian population. The sample comprised multidetector computed tomography (MDCT) scans of 50 male and 50 female adults. Segmentation of the MDCT scans was performed using 3D Slicer, and four landmarks were acquired using Stratovan Checkpoint for the subpubic angle measurement. The technical error of measurement (TEM), relative TEM, and coefficient of reliability (R) exhibited high reliability in measurements. Results showed that the subpubic angle in males was 68.6°±7.6° and in females 87.4°±6.5°. The subpubic angle in females was significantly larger than in males (<0.001). Inverse correlation was found between the subpubic angle and age, in both males (=-0.449, <0.01) and females (=-0.385, <0.01). The overall accuracy of sex estimation using the subpubic angle was 94% (<0.001). The subpubic angle, with a demarcating point of 78.6°, showed a sensitivity and specificity of 94% in the classification of female individuals. In conclusion, sex estimation using the subpu bic angle is highly accurate, with a high degree of expected sensitivity and specificity in the Malaysian population.
由于获取有记录的骨骼标本的机会有限，法医人类学研究在马来西亚起步较晚。然而，先进的成像技术提供了虚拟骨样本，可用于形态测量研究，通过虚拟人类学建立特定人群的标准。本研究利用骨盆的三维计算机断层扫描模型，对当代马来西亚人群耻骨下角的性别二态性进行了研究。样本包括50名成年男性和50名成年女性的多排螺旋计算机断层扫描（MDCT）。使用3D Slicer对MDCT扫描进行分割，并使用Stratovan Checkpoint获取四个标志点以测量耻骨下角。测量技术误差（TEM）、相对TEM和可靠性系数（R）在测量中表现出高可靠性。结果显示，男性耻骨下角为68.6°±7.6°，女性为87.4°±6.5°。女性的耻骨下角明显大于男性（<0.001）。在男性（=-0.449，<0.01）和女性（=-0.385，<0.01）中，耻骨下角与年龄均呈负相关。使用耻骨下角进行性别估计的总体准确率为94%（<0.001）。耻骨下角以78.6°为分界点，在女性个体分类中的敏感性和特异性为94%。总之，在马来西亚人群中，使用耻骨下角进行性别估计具有高度准确性，预期敏感性和特异性较高。
