Determining Sex of the Posterior Ilium from the Robert J. Terry and William M. Bass Collections
Article first published online: 27 MAR 2012
© 2012 American Academy of Forensic Sciences
Journal of Forensic Sciences
Volume 57, Issue 5, pages 1155–1160, September 2012
How to Cite
Novak, L., Schultz, J. J. and McIntyre, M. (2012), Determining Sex of the Posterior Ilium from the Robert J. Terry and William M. Bass Collections. Journal of Forensic Sciences, 57: 1155–1160. doi: 10.1111/j.1556-4029.2012.02122.x
- Issue published online: 5 SEP 2012
- Article first published online: 27 MAR 2012
- Received 25 Jan. 2011; and in revised form 14 May 2011; accepted 3 July 2011.
- forensic science;
- forensic anthropology;
- sexual dimorphism;
- logistic regression;
- classification correctness
Abstract: Morphological traits of the posterior ilium are commonly used for sex determination in bioarcheological and forensic skeletal analysis. This study was designed to compare the classification correctness of standard scoring systems and measurements of the posterior ilium, including using logistic regression, to develop new formulae to predict sex. Metric measurements and morphological scores for the preauricular sulcus (PS), the elevation of the auricular surface, and the greater sciatic notch width were recorded for 97 males and 101 females of both European and African ancestry from the William M. Bass and Terry Collections. Correct classification of sex was high using individual traits such as the greater sciatic notch score (88.4%), the presence or absence of a PS (78.8%), and the scoring of a present PS as 1, 2, or 3 (100%). Furthermore, an equation combining multiple traits of the posterior ilium had a high classification of 94.9%.