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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sexing the Cranium from the Foramen Magnum Using Discriminant Analysis in a Brazilian Sample

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Author(s):
Thais Torralbo Lopez-Capp [1] ; Christopher Rynn [2] ; Caroline Wilkinson [3] ; Luiz Airton Saavedra de Paiva [4] ; Edgard Michel-Crosato [5] ; Maria Gabriela Haye Biazevic [6]
Total Authors: 6
Affiliation:
[1] Universidade de São Paulo. Department of Community Dentistry - Brasil
[2] University of Dundee. Center of Anatomy and Human Identification - Reino Unido
[3] Liverpool John Moores University. Liverpool School of Art and Design - Reino Unido
[4] IEPCF - Instituto de Ensino e Pesquisa em Ciências Forenses - Brasil
[5] Universidade de São Paulo. Department of Community Dentistry - Brasil
[6] Universidade de São Paulo. Department of Community Dentistry - Brasil
Total Affiliations: 6
Document type: Journal article
Source: Brazilian Dental Journal; v. 29, n. 6, p. 592-598, 2018-12-00.
Abstract

Abstract In the identification process, the foramen magnum has shown controversial results in sex estimation. The present study aimed to analyze the morphometric variables of the foramen magnum in Brazilian adult cranium for sex estimation. The sample was composed of 100 craniums (53 males and 47 females) from the documented collection of the Institute of Teaching and Research in Forensic Sciences. The protocol measurement was constituted of two linear measurements: maximum length of the foramen magnum and maximum breadth of the foramen magnum and two formulas to calculate the area, method one (M1) and method two (M2). Descriptive statistics showed statistically significant differences between sex (p<0.05) for all variables. The univariate discriminant functions showed an accuracy between 56.0-62.0%, and the multivariate analysis showed a percentage of accuracy between 60.0-65.0%, the greatest accuracy was found combining the two linear measurements with M1(71.7%), even after cross-validation (66%). Receiver Operating Characteristic (ROC) curve analysis showed that M2 is the best parameter for estimating sex (AUC=0.693). A reference table for Brazilians using the foramen magnum parameters was developed based on the results of the ROC curve analysis. In conclusion, the foramen magnum should be used with caution to estimate sex in forensic cases of fragmentary craniums, due to the limited accuracy. (AU)

FAPESP's process: 14/23727-6 - Comparative analysis of Brazilian and Scottish population for estimating sex, ancestry and age: a forensic anthropology study
Grantee:Thais Torralbo Lopez Capp
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 11/18577-7 - Comparative study of four methods of sex estimation using the frontal bone angle: skull study in a forensic medicine service
Grantee:Maria Gabriela Haye Biazevic
Support type: Regular Research Grants
FAPESP's process: 14/13340-7 - Comparative analysis of the Brazilian and Scottish population for estimating sex age and ancestry: a Forensic Anthropology study
Grantee:Thais Torralbo Lopez Capp
Support type: Scholarships in Brazil - Doctorate (Direct)