Application of DSP2 for biological sex estimation in a Spanish sample: analysis based on sex and side.

IF 2.2 3区 医学 Q1 MEDICINE, LEGAL International Journal of Legal Medicine Pub Date : 2024-11-15 DOI:10.1007/s00414-024-03358-1
Marta San-Millán, Varsha Warrier, Anna Carrera, Francisco Reina
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Abstract

Applying existing sexing methodologies to different populations, and reporting these findings is important to enhance their applicability and accuracy in real cases across the world. DSP was published in 2005 (Murail et al., 2005) and updated as a DSP2 in 2017 (Brůžek et al., 2017) based on a database of 10 pelvic measurements from 2040 individuals worldwide. These tools have been applied subsequently to various populations, however, its applicability to a dry Spanish population is lacking. 303 hipbones belonging to 157 individuals from the School of Legal Medicine from the University Complutense of Madrid (Spain), of which 140 individuals were documented, were analyzed to investigate the reliability, applicability and accuracy of the DSP2 sex estimation methodology, examining side and sex-based potential differences for the first time. In most of the DSP variables, intra-rater reliability showed excellent results and % applicability was higher than 85.0%. Overall % accuracy was higher than 94.0% regardless of the number or discriminant power of the utilized DSP variables. However, % sexing decreased when less variables or less discriminant ones were used for estimations, reaching 45.51% (left) and 43.31% (right). Regarding sexual dimorphism, females' results of % applicability, % sexing and % accuracy were higher compared to males. In addition, left os coxae achieved better outcomes (aforementioned percentages) in most of the cases in the sex-pooled sample. Decreasing the mandatory posterior probability by 10% yielded an increase in the % sexing but reduced % accuracy, and thus, does not seem to enhance the approach's performance. The present study validates the applicability and reliability of DSP for sexing a Spanish population. Future investigations will attempt to assess its applicability within virtual anthropology.

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在西班牙样本中应用 DSP2 进行生物性别估计:基于性别和侧面的分析。
将现有的性别鉴定方法应用于不同人群,并报告这些发现对于提高其在全球真实案例中的适用性和准确性非常重要。DSP 于 2005 年发布(Murail 等人,2005 年),并于 2017 年更新为 DSP2(Brůžek 等人,2017 年),其基础是来自全球 2040 个个体的 10 个骨盆测量数据库。这些工具随后被应用到不同的人群中,但在干燥的西班牙人群中却缺乏适用性。为了研究 DSP2 性别估计方法的可靠性、适用性和准确性,我们对马德里康普斯顿大学(西班牙)法医学院 157 人的 303 块髋骨(其中 140 人有记录)进行了分析,首次研究了基于侧面和性别的潜在差异。在大多数 DSP 变量中,评分者内部的可靠性显示出极佳的结果,适用性百分比高于 85.0%。无论使用的 DSP 变量的数量或判别能力如何,总体准确率都高于 94.0%。然而,当使用的变量较少或判别能力较低时,性别准确率就会下降,分别为 45.51%(左侧)和 43.31%(右侧)。在性别二态性方面,雌性的适用率、性别鉴定率和准确率都高于雄性。此外,在性别汇总样本中的大多数情况下,左髋骨取得了更好的结果(上述百分比)。将强制性后验概率降低 10%,可提高性别鉴定率,但准确率却降低了,因此似乎并没有提高该方法的性能。本研究验证了 DSP 在西班牙人口性别鉴定中的适用性和可靠性。未来的研究将尝试评估其在虚拟人类学中的适用性。
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来源期刊
CiteScore
5.80
自引率
9.50%
发文量
165
审稿时长
1 months
期刊介绍: The International Journal of Legal Medicine aims to improve the scientific resources used in the elucidation of crime and related forensic applications at a high level of evidential proof. The journal offers review articles tracing development in specific areas, with up-to-date analysis; original articles discussing significant recent research results; case reports describing interesting and exceptional examples; population data; letters to the editors; and technical notes, which appear in a section originally created for rapid publication of data in the dynamic field of DNA analysis.
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