Discriminant analysis of mandibular measurements for the estimation of sex in a modern Brazilian sample

Autor(es)

Lopez-Capp, Thais Torralbo ^[1] ; Rynn, Christopher ^[2] ; Wilkinson, Caroline ^[3] ; Saavedra de Paiva, Luiz Airton ^[4] ; Michel-Crosato, Edgard ^[1] ; Haye Biazevic, Maria Gabriela ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo FOUSP, Sch Dent, Community Dent Deparment, Ave Prof Lineu Prestes 2227, BR-05508000 Sao Paulo, SP - Brazil

^[2] Univ Dundee, Ctr Anat & Human Identificat CAHID, Dow St, Dundee DD1 5EH - Scotland

^[3] Liverpool John Moores Univ, Liverpool Sch Art & Design, Liverpool Sci Pk IC1, Liverpool, Merseyside - England

^[4] Inst Teaching & Res Forens Sci IEPCF, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF LEGAL MEDICINE; v. 132, n. 3, p. 843-851, MAY 2018.
• Citações Web of Science: 2

Resumo

The present study aimed to evaluate the accuracy of mandibular measurements for sex determination in a Brazilian population. The sample was composed of 100 mandibles, of which 53 were female and 47 were male, and the average age was 57.03 years. The mandible measurement protocol was composed of 15 measurements, of which six were bilateral and nine were unique. Mandibles were directly measured using a digital caliper and a protractor. The descriptive analysis of the present study revealed higher mean values for male mandibles compared to those for female mandibles with the exception of the left mandibular angle. Among the 21 measures analyzed in this group, 15 were statistically significant (p < 0.05). Univariate discriminant analyses produced a mean percentage of correct predictions that varied between 49 and 79%. The association of variables increased the percentage of correct prediction of sex to vary from 76 to 86%. The receiver operator characteristic (ROC) curve analysis indicated that the best variable for estimating sex was bigonial breadth (BGB; area under the ROC curve (AUC) = 0.764) followed by the right maximum ramus height (MRHr; AUC = 0.763). A reference table for estimating sex in a Brazilian population using mandible measurements was developed based on the ROC curve analysis. Mandibular measures provide a simple and reliable method for sex discrimination in Brazilian adults due to the sexual dimorphism revealed by analysis of the metric variables and the satisfactory results demonstrated by discriminant formulas, ROC curve analysis, and the reference table. (AU)

• Processo FAPESP: 11/18577-7 - Estudo comparativo de quatro métodos para a estimativa do sexo através da quantificação do ângulo frontal: estudo de crânios em Instituto Médico Legal
• Beneficiário: Maria Gabriela Haye Biazevic
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/23727-6 - Análise comparativa entre a população brasileira e escocesa para estimativa de sexo, ancestralidade e idade: um estudo de antropologia forense
• Beneficiário: Thais Torralbo Lopez Capp
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 14/13340-7 - Análise comparativa entre a variabilidade métrica dos parâmetros de Antropologia Forense para estimativa do sexo, idade e ancestralidade de duas populações: escocesa e brasileira
• Beneficiário: Thais Torralbo Lopez Capp
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto