Age estimation using postmortem computed tomography-based Hounsfield unit values of the palate and mandibular condyle and the Eichner classification

IF 1.3 4区医学 Q3 MEDICINE, LEGAL

Legal Medicine Pub Date : 2024-04-16 DOI:10.1016/j.legalmed.2024.102446

Shoken Suzuki , Maki Ohtani , Yuhei Matsuo , Masayuki Fukuda , Sohtaro Mimasaka

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引用次数: 0

Abstract

Age estimation is important in forensic investigations of unidentified human remains. This study assessed the correlation between age and Hounsfield unit (HU) values of the palate and mandibular condyle based on postmortem computed tomography (CT) and analyzed the influence of occlusal support in developing an age estimation method for Japanese individuals, including older adults.

The sample consisted of a training dataset (357 cadavers) and a validation dataset (300 cadavers) that underwent postmortem CT.

Three measurements were selected: the respective HU values of the palate and mandibular condyle and the Eichner classification. The correlation coefficients between age and HU values were also evaluated. Multiple stepwise regression analysis was performed to evaluate the significance of four parameters (sex, respective HU values of the palate and mandibular condyle, and the Eichner classification) for age estimation and to determine the best age estimation formula. In the validation tests, inaccuracy and bias were calculated for the groups aged ≥65 or <65 years.

Significant correlations between age and HU values of the palate and mandibular condyle were observed, regardless of sex. In multiple stepwise regression analysis, all variables except sex were significantly correlated with age. The age estimation formula from the regression analysis was useful, and the validation test exhibited high accuracy, especially in older adults.

The HU values of the palate and mandibular condyle and the Eichner classification are useful for age estimation in Japanese individuals.

查看原文本刊更多论文

使用基于死后计算机断层扫描的上颚和下颌髁状突 Hounsfield 单位值和 Eichner 分类法估算年龄

在对身份不明的人类遗骸进行法医调查时，年龄估计非常重要。本研究根据死后计算机断层扫描（CT）评估了年龄与上颚和下颚髁状突的 Hounsfield 单位（HU）值之间的相关性，并分析了咬合支持对开发日本人（包括老年人）年龄估计方法的影响。同时还评估了年龄与 HU 值之间的相关系数。进行了多元逐步回归分析，以评估四个参数（性别、上颚和下颌髁状突各自的 HU 值以及 Eichner 分级）对年龄估计的意义，并确定最佳年龄估计公式。在验证测试中，计算了年龄≥65 岁或 65 岁组的不准确性和偏差。在多元逐步回归分析中，除性别外，所有变量均与年龄显著相关。回归分析得出的年龄估计公式是有用的，验证测试显示出很高的准确性，尤其是在老年人中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Legal Medicine Nursing-Issues, Ethics and Legal Aspects

CiteScore

2.80

自引率

6.70%

发文量

119

审稿时长

7.9 weeks

期刊介绍： Legal Medicine provides an international forum for the publication of original articles, reviews and correspondence on subjects that cover practical and theoretical areas of interest relating to the wide range of legal medicine. Subjects covered include forensic pathology, toxicology, odontology, anthropology, criminalistics, immunochemistry, hemogenetics and forensic aspects of biological science with emphasis on DNA analysis and molecular biology. Submissions dealing with medicolegal problems such as malpractice, insurance, child abuse or ethics in medical practice are also acceptable.