Morphometric sex estimation from 3D computed tomography os coxae model and its validation in skeletal remains
Morphometric sex estimation from 3D computed tomography os coxae model and its validation in skeletal remains
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DOI：
10.1007/s00414-014-1033-x
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发表时间：
2014-09-01
影响因子：
2.1
通讯作者：
Botella, Miguel
中科院分区：
文献类型：
--
作者：
Djorojevic, Mirjana;Roldan, Concepcion;Botella, Miguel
在过去的十年中，成像技术的进步加强了多层计算机断层扫描 (MSCT) 在人类学方面的应用。已发表的文献证明它是在不同解剖区域建立性别二态性特征的合适工具。在这种背景下，本研究的主要目的是探索传统形态测量方法应用于西班牙现生人口三维（3D）重建基节数据时的准确性，开发一系列统计稳健的性别评估模式，并测试其在无名遗骸中的有效性。为此，选择了 150 个体积渲染的无名 CT 扫描，通过描述性统计和判别函数分析 (DFA)（采用折刀程序进行交叉验证）来检查 9 个地标间线性距离。五次测量显示性别二态性。髋臼直径是最准确的预测指标。这与无名高度和无名宽度相结合，对性别估计做出了非常重要的贡献。总体而言，分类准确率为 89.3-95.3%（交叉验证后为 89.3-94.7%），性别偏差低于 5%。第二种验证方法对来自另一个当代西班牙参考集合（包含干骨）的 96 个人样本进行，显示出较高的准确分类百分比（83.3-95.8%）。总之，使用髋骨横截面 MSCT 图像评估性别是可能的，并且在西班牙活着的个体上获得的判别函数也可以有效地从骨骼遗骸中估计性别。
In the last decade, the advances in imaging technologies have intensified the use of multislice computed tomography (MSCT) for anthropological purposes. The published literature has proved it to be a suitable tool for establishing sexually dimorphic characteristics in different anatomical areas. In this context, the main purpose of the present study was to explore the accuracy of traditional morphometric method when applied to data acquired in three-dimensional (3D) reconstructed os coxae of living Spanish population, to develop a series of statistically robust patterns for sex assessment and to test their validity in innominate remains. For this purpose, 150 volume-rendered innominate CT scans were selected to examine nine interlandmark linear distances by means of descriptive statistics and discriminant function analyses (DFA) employing the jackknife procedure for cross-validations. Five measurements were sexually dimorphic. Acetabular diameter was the single most accurate predictor. This, combined with innominate height and innominate breadth, contributed very significantly to sex estimation. Overall, classification accuracies were 89.3-95.3 % (89.3-94.7 % after cross-validation), with a sex-bias lower than 5 %. The second validation approach performed on a sample of 96 individuals from another contemporary Spanish reference collection comprising dry bones showed the high percentage of accurate classification (83.3-95.8 %). In conclusion, the assessment of sex using cross-sectional MSCT images of the os coxae is possible and the discriminant functions obtained on Spanish living individuals can also be effective for estimating sex from skeletal remains.