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Discriminant Function Analysis for Sex Assessment in Pelvic Girdle Bones: Sample from the Contemporary Mexican Population

Authors

  • Jorge Alfredo Gómez-Valdés M.A.,

    1. Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, Universidad 3000 C.P. 04510 México, D.F. Circuito Interior S/N, Ciudad Universitaria.
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  • Guillermo Torres Ramírez B.A.,

    1. Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, Universidad 3000 C.P. 04510 México, D.F. Circuito Interior S/N, Ciudad Universitaria.
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  • Socorro Báez Molgado M.A.,

    1. Forensic Osteology, Department of Anthropology, California State University, East Bay, 3095 Meiklejohn Hall, Hayward, CA 94542.
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  • Patricia Herrera Sain-Leu M.D.,

    1. Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, Universidad 3000 C.P. 04510 México, D.F. Circuito Interior S/N, Ciudad Universitaria.
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  • José Luis Castrejón Caballero Ph.D.,

    1. Escuela Nacional de Antropología e Historia, Instituto Nacional de Antropología e Historia, Periférico Sur y Zapote s/n, Colonia Isidro Fabela C.P., 14030 México, D.F.
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  • Gabriela Sánchez-Mejorada M.D., Ph.D.

    1. Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, Universidad 3000 C.P. 04510 México, D.F. Circuito Interior S/N, Ciudad Universitaria.
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Additional information and reprint requests:
Gabriela Sánchez-Mejorada, M.D., Ph.D.
Departamento de Anatomía
Facultad de Medicina
Universidad Nacional Autónoma de México
Ciudad de México 04510
México
E-mail: millang@servidor.unam.mx

Abstract

Abstract:  Sex assessment of skeletal remains plays an important role in forensic anthropology. The pelvic bones are the most studied part of the postcranial skeleton for the assessment of sex. It is evident that a population-specific approach improves rates of accuracy within the group. The present study proposes a discriminant function method for the sex assessment of skeletal remains from a contemporary Mexican population. A total of 146 adult human pelvic bones (61 females and 85 males) from the skeletal series pertaining to the National Autonomous University of Mexico were evaluated. Twenty-four direct metrical parameters of coxal and sacral bones were measured and subsequently, sides and sex differences were evaluated, applying a stepwise discriminant function analysis. Coxal and sacra functions achieved accuracies of 99% and 87%, respectively. These analyses follow a population-specific approach; nevertheless, we consider that our results are applicable to any other Hispanic samples for purposes of forensic human identification.

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