Discriminant Function Analysis of Mandibular Condyle and Notch for Sex Determination
Iboro E. Edet
*
Doctoral Program in Anatomy, Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Port Harcourt, Nigeria and Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Uyo, Nigeria.
E. J. Olotu
Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Port Harcourt, Nigeria.
E. I. Edibamode
Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Port Harcourt, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Aim: This research aimed at deriving discriminant function equation from Bicondylar Braedth (BCB) and mandibular Notch Breadth (MNB) for sex determination.
Study Design: A cross-sectional descriptive study was adopted for this research.
Place and Duration of Study: BCB and MNB measurements were obtained from 13 universities across South – South, South – East, North Central and South – west geo – political zones in Nigeria from January to June 2021.
Methodology: BCB and MNB were measured from 52 males and 30 females mandibles using vernire caliper. Data obtained were analyzed using SPSS IBM version 23.0.
Results: Descriptive analysis of BCB showed higher mean values for males 115.46mm compared to females 107.78mm; while MNB showed a higher mean value for females 25.00mm compared to males 24.41mm. Independent t-test analysis of the parameters showed BCB had significant sexual difference while MNB did not show significant sexual difference at 95% confident interval. The discriminant function analysis of BCB well discriminated sex and after cross-validation, BCB accurately predicted 82.7% males and 56.7% females but MNB could not discriminate sex.
Conclusion: BCB is a reliable parameter for sex determination which is fundamental in forensic investigation whereas MNB is not suitable for sex determination.
Keywords: Measurement, bicondylar, mandibular notch breadth, mandible, sex, determination