Classification performance of the Sella-Tunis et al. (2017) sex estimation method in Czech population: different posterior probability threshold approaches.

Autor: Rmoutilová R; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic. vejnaror@natur.cuni.cz.; Hrdlicka Museum of Man, Faculty of Science, Charles University, Viničná 7, 128 00, Prague 2, Czech Republic. vejnaror@natur.cuni.cz., Piskačová K; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic., Pilmann Kotěrová A; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic., Dupej J; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic., Bejdová Š; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic., Velemínská J; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic., Brůžek J; Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic.
Jazyk: angličtina
Zdroj: International journal of legal medicine [Int J Legal Med] 2024 Sep; Vol. 138 (5), pp. 2127-2138. Date of Electronic Publication: 2024 May 08.
DOI: 10.1007/s00414-024-03241-z
Abstrakt: In this study we tested classification performance of a sex estimation method from the mandible originally developed by Sella-Tunis et al. (2017) on a heterogeneous Israeli population. Mandibular linear dimensions were measured on 60 CT scans derived from the Czech living population. Classification performance of Israeli discriminant functions (DFs-IL) was analyzed in comparison with calculated Czech discriminant functions (DFs-CZ) while different posterior probability thresholds (currently discussed in the forensic literature) were employed. Our results comprehensively illustrate sensitivity of different discriminant functions to population differences in body size and degree of sexual dimorphism. We demonstrate that the error rate may be biased when presented per posterior probability threshold. DF-IL 1 showed least sensitivity to population origin and fulfilled criteria of sufficient classification performance when applied on the Czech sample with a minimum posterior probability threshold of 0.88 reaching overall accuracy ≥ 95%, zero sex bias, and 80% of classified individuals. The last parameter was higher in DF-CZ 1 which was the main difference between those two DFs suggesting relatively low dependance on population origin. As the use of population-specific methods is often prevented by complicated assessment of population origin, DF-IL 1 is a candidate for a sufficiently robust method that could be reliably applied outside the reference sample, and thus, its classification performance deserves further testing on more population samples.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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