Improving sex estimation from crania using a novel three-dimensional quantitative method

Emam E. Abdel Fatah, Natalie R. Shirley, Richard L. Jantz, Mohamed R. Mahfouz

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

This study utilizes an innovative 3D approach to discover metric variables that obtain the highest classification rates for sex estimation from the cranium. Models were constructed from 222 cranial CT scans of U.S. Whites from the Bass Donated Collection. These models were used to create a statistical bone atlas that captures the primary shape variation in the skull and facilitates rapid computer-automated analyses. The bone atlas showed that important size-related sex variables are bizygomatic breadth, maximum cranial length, cranial base length, and mastoid height. Shape-related variables capture sex differences in the projection of the glabellar region, inclination of the frontal, and cranial base flexion. In addition, vault thickness is highly dimorphic, with females having on average thicker vaults in the frontal region, and males having thicker vaults in the occipital region. Cross-validated linear discriminant analysis obtained >95% accuracy (97.5% with 11 variables and 95.5% with eight variables).

Original languageEnglish (US)
Pages (from-to)590-600
Number of pages11
JournalJournal of Forensic Sciences
Volume59
Issue number3
DOIs
StatePublished - May 2014

Keywords

  • Cranial base
  • Cranium
  • Forensic anthropology
  • Forensic science
  • Geometric morphometrics
  • Sex estimation
  • Sexual dimorphism
  • Statistical atlas
  • Three-dimensional analysis
  • Vault thickness

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Genetics

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