Evaluation of Greater Sciatic Notch Parameters in Sex Determination of Hip Bone by Three-Dimensional CT Images HC01-HC05
Dr. Soheila Ghorbani,
Assistant Professor, Department of Forensic Medicine, Iran University of Medical Sciences, Tehran, Iran.
Introduction: Sex determination of an anonymous individual is one of the main objective when human skeletal remains are found, both in forensic investigation and archaeological studies.
Aim: To evaluate the role of Greater Sciatic Notch (GSN) parameters in sex determination in the Iranian population by means of Three-Dimensional (3D) images reconstructed by multi-slice Computed Tomography (CT).
Materials and Methods: In the present cross-sectional study, 237 cases (121 females and 116 males) who received Pelvic CT in radiology department of Rasoul-e-Akram Hospital were included. The GSN parameters including the width, depth and posterior segment were applied to measure the 3D-CT radiographs of participants hip bone using digital instruments with an accuracy of 0.01º and 0.01 mm. SPSS version 21 was used to analyse the data using the independent sample t-test, chi-square test, Pearson’s correlation test and Roc curve.
Results: Among the GSN parameters, depth had no difference among males and females, in both right and left sides (p=0.767 and p=0.561, respectively); thus, was not useful in sex determination. GSN parameters including Depth (p=0.008), Post segment (p=0.017), and Index 2 (p=0.015) were different in right and left sides and cannot be considered for sex determination without considering the sides. Moreover, Post angle (90.3%) and Post segment (89.5%) were found to have the most accuracy in sex determination.
Conclusion: Most of the parameters of GSN except for depth were useful for sex determination. Application of 3D-CT micrographs in the present study helped us to easily quantify sexual dimorphism in the GSN, suggesting 3D-CT can be considered as one of the valuable tools in practical forensic osteology investigation due to the great accuracy to measure the sex differences.