Validation of discriminant functions from the rib necks in two Portuguese adult identified populations

Sexual dimorphism is the basis for sex estimation research in skeletal remains, helping the positive identification of individuals in forensic backgrounds. In this regard, it has been proved that the metrical analysis of the costal neck of the first four ribs in Spanish contemporary adult skeletons...

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Bibliographic Details
Published in:International journal of legal medicine 2023-05, Vol.137 (3), p.851-861
Main Authors: Partido Navadijo, Manuel, Monge Calleja, Álvaro M., Ferreira, Maria Teresa, Alemán Aguilera, Inmaculada
Format: Article
Language:English
Subjects:
Adult
Collection
Cost analysis
Discriminant Analysis
Ethnicity
Forensic Anthropology
Forensic Medicine
Human remains
Humans
Medical Law
Medicine
Medicine & Public Health
Original Article
Portugal
Ribs - anatomy & histology
Sex Determination by Skeleton - methods
Sexual dimorphism
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Summary:Sexual dimorphism is the basis for sex estimation research in skeletal remains, helping the positive identification of individuals in forensic backgrounds. In this regard, it has been proved that the metrical analysis of the costal neck of the first four ribs in Spanish contemporary adult skeletons shows high sexual dimorphism, especially in the first rib. However, the validation of any method developed in identified skeletal collections must be compulsorily reproduced in other skeletonized sets to verify either its potential application in individuals from other locations, or the existence of possible biases associated with inter-population variation. Due to the geographical and socioeconomic proximity between Spain and Portugal, this paper aims to check the utility of the discriminant functions designed by Partido-Navadijo et al. (2021) in the two skeletal collections of the University of Coimbra (Portugal). Results show the utility of these discriminant functions in Portuguese population, with frequencies of cases correctly assigned reaching up to 93.6% in the Coimbra Identified Skeletal Collection (CISC); and up to 92.6% in the 21 st Century Identified Skeletal Collection (CEI/XXI). However, two particularities between the Spanish and Portuguese osteological assemblages can be highlighted: the possible existence of secular changes in relation to the CISC collection (1904–1938); and a reversal in the degree of costal dimorphism, being the third and fourth ribs of the CEI/XXI collection more dimorphic than the first ones.
ISSN:0937-9827
1437-1596
DOI:10.1007/s00414-023-02957-8