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

Sex estimation from the mastoid process using Micro-CT among Brazilians: Discriminant analysis and ROC curve analysis

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Author(s):
Kramer, Nitiely Arrais [1] ; Lopez-Capp, Thais Torralbo [1] ; Michel-Crosato, Edgard [1] ; Haye Biazevic, Maria Gabriela [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo FOUSP, Sch Dent, Community Dent Dept, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF FORENSIC RADIOLOGY AND IMAGING; v. 14, p. 1-7, SEP 2018.
Web of Science Citations: 0
Abstract

The present study aimed to analyze morphometric variables of the mastoid process using X-ray microtomography images for sex estimation. The sample was composed of 60 microtomography images from dried skulls. Three measurements were applied: asterion-porion, mastoideale-porion and asterion-mastoideale. The area of the triangle was calculated by two methodologies: software myVGL2.2 + Heron's formula (M1) and software myVGL2.2 + Adobe Photoshop CS6 (M2). The right area (RA) and left area (LA) were calculated, and the sum of them was considered the total area (TA). Descriptive analysis of M1 and M2 showed statistically significant differences between sex (p < 0.05). The univariate discriminant analysis showed an overall percentage of correct classification of sex varying between 75-80% for M1 and 71.7-73.3% for M2. The multivariate discriminant analysis demonstrated reduced classification percentages. The ROC curve analysis showed better results for M1 compared to M2. The best variable using M1 was the TA, with an 81.45% accurate sex estimation. Based on the ROC curve analysis results, a reference table was developed to be applied for the sex estimation of Brazilian individuals. In conclusion, the mastoid process has good sexual dimorphism in Brazilian skulls and can be considered a tool for predicting sex in cases of fragmented craniums. (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: 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)
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