Sex Determination in Thai Skulls by Using Craniometry: Multiple Logistic Regression Analysis

Authors

  • Sanjai Sangvichien Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Komon Boonkaew Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Aporn Chuncharunee Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Chulaluk Komoltri Division of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Sitha Piyawinitwong Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Alongkorn Wongsawut Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Suwalee Namwongsa Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University

Keywords:

craniometry, Cranium, multiple logistic, regression analysis, sex determination, Thais

Abstract

Objective: To evaluate sexual dimorphism in the cranium and mandible of Thais by using Jorgensenûs craniometry and to develop a statistical model to determine sex from craniometrical measurements and indices.

Methods: One hundred and one Thai skulls (66 males and 35 females) which ranged in age from 18 to 86 years were studied.

Results: According to craniometry, the skull of a male is larger and higher than that of a female. Considering each individual measurement, although 26 of 30 measurements and 5 of 14 indices showed a statistically significant difference between males and females, they had some overlaps. To predict gender more accurately, a multiple logistic regression model based on 4 skull measurements (mm) i.e., nasion-basion length (M5), maximum breadth of the cranium (M8), facial length (M40), and bizygomatic breadth of the face (M45) was developed as follows: In (odds) = Z = -52.5312 + 0.27 M5 - 0.1867 M8 + 0.1268 M40 + 0.319 M45 The probability of being males (P) is then ez /(1+ez ). Using a cut off point for P of 0.5, this logistic model could correctly predict 82.9% (95% CI: 66.4%, 93.4%) of females and 92.1% (95% CI: 82.4%, 97.4%) of males respectively with the overall accuracy of 88.8% (95% CI: 80.8%, 94.3%).

Conclusion: Jorgensenûs craniometry of the cranium and mandible can be used to determine gender among Thais via a multiple logistic regression model on M5, M8, M40 and M45.

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Published

01-09-2007

How to Cite

Sangvichien, S. ., Boonkaew, K. ., Chuncharunee, A., Komoltri, C. ., Piyawinitwong, S., Wongsawut, A., & Namwongsa, S. . (2007). Sex Determination in Thai Skulls by Using Craniometry: Multiple Logistic Regression Analysis. Siriraj Medical Journal, 59(5), 216–221. Retrieved from https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246135

Issue

Vol. 59 No. 5 (2007): Sep-Oct

Section

Original Article

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