Article2011

Virtual Determination of Sex: Metric and Nonmetric Traits of the Adult Pelvis from 3D Computed Tomography Models*,†

Summer Decker · Stephanie L. Davy-Jow · Jonathan M. Ford · Don R. Hilbelink

151 citations0/0 files storedJournal of Forensic Sciences

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Forensic Anthropology and Bioarchaeology Studies 3D Surveying and Cultural Heritage Forensic Entomology and Diptera Studies

Abstract

Examination of the adult os coxae and sacrum is one of the most common methods of sex estimation from bone. Medical imaging, such as computed tomography (CT), provides the opportunity for three-dimensional (3D) imaging of the skeleton from clinical scans of known individuals in situ. In this study, a randomly selected subset of abdominopelvic CT-derived models were used to evaluate simple, repeatable metric methods of sex estimation based on a combination of obstetric measurements and the traditionally nonmetric Phenice-derived traits. A four-variable discriminant function for sex estimation was developed based on statistical analyses. Overall, the cross-validated accuracy of this method was 100%, with inter-observer error showing an average of only 2.2%. Comparative analysis was run on the data set using FORDISC 3.0. This study shows that current sex determination standards from the pelvis should be updated to include more in vivo data to increase the accuracy of identification.

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References

1994Standards for Data Collection from Human Skeletal Remains 1969A newly developed visual method of sexing the os pubis 2002A method for visual determination of sex, using the human hip bone 1987Human Osteology: A Laboratory and Field Manual 1998Forensic Osteology: Advances in the Identification of Human Remains 1994Standards for Data Collection from Human Skeletal Remains: Proceedings of a Seminar at the Field Museum of Natural History 2005Greater sciatic notch morphology: Sex, age, and population differences 1999Osteometric variation in the humerus: sexual dimorphism in South Africans

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