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Review paper

Model "P" in gender prediction based on the mastoid process

By
Aida Sarač-Hadžihalilović ,
Aida Sarač-Hadžihalilović
Contact Aida Sarač-Hadžihalilović

Department of Anatomy, School of Medicine, University of Sarajevo, Sarajevo, Bosnia and Herzegovina

Edin Hojkurić ,
Edin Hojkurić

Community Health Center, Tešanj, Tešanj, Bosnia and Herzegovina

Miralem Musić ,
Miralem Musić

3 Department of Pathophysiology, School of Medicine, University of Sarajevo, Sarajevo, Bosnia and Herzegovina

Ilvana Hasanbegović ,
Ilvana Hasanbegović

Department of Anatomy, School of Medicine, University of Sarajevo, Sarajevo, Bosnia and Herzegovina

Zurifa Ajanović ,
Zurifa Ajanović

Department of Anatomy, School of Medicine, University of Sarajevo, Sarajevo, Bosnia and Herzegovina

Lejla Dervišević ,
Lejla Dervišević

Department of Anatomy, School of Medicine, University of Sarajevo, Sarajevo, Bosnia and Herzegovina

Selmira Brkić
Selmira Brkić

Department of Pathophysiology, School of Medicine, University of Tuzla, Tuzla, Bosnia and Herzegovina

Abstract

Aim
To determine the degree of accuracy in determining the sex of the skull based on classical morphometric analysis of the mastoid process. Morphometric analysis excluded a subjective approach expressed in osteoscopic analysis.
Methods
The study was conducted on a sample of 100 macerated skulls of known gender and age from the second half of the 20th century, including the Bosnian population. Of the 100 skulls, 50 (50%) were male and 50 (50%) were female. Male skulls were on average 60 (47-71) years old and female 57 (43-76) years old. At each mastoid process, 3 measurements were made: mastoid length, mastoid width (medio-lateral diameter) ML) and anteroposterior diameter (AP) of the mastoid process. Results
Using the univariate method, we found a significant difference between length, width, AP diameter and size of mastoid processes as well as between gender (p <0.05). Multivariate binary logistic regression showed statistically significant differences in AP diameter of the mastoid process (p<0.05).
Conclusion
The created model "P" ("P"=exp [X]/1+exp [X]) for sex determination based on mastoid process showed sensitivity of 82% correct prediction for female skulls and 65% accurate prediction for male skulls. This discourse with respect of population standards grants most effective anthropological proof and as such may be suggested for forensic expertise based on human skull.

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