Greater sciatic notch in sex determination

Area of Science:

• Forensic Anthropology
• Anatomy
• Osteology

Background:

• Sex determination from skeletal remains is crucial in forensic anthropology.
• The greater sciatic notch is a key anatomical feature used in sex estimation.
• Previous studies have yielded varying results on the reliability of different measurements.

Purpose of the Study:

• To evaluate the efficacy of various greater sciatic notch measurements for sex determination in adult hip bones.
• To identify the most accurate parameter for distinguishing male from female hip bones.
• To establish demarking points for reliable sex identification.

Main Methods:

• Measurements of greater sciatic notch width, depth, and posterior segment length were taken from 200 adult hip bones (120 male, 80 female).
• Indices I and II, total and posterior angles were calculated.
• Demarking points for sexing were determined for seven parameters.

Main Results:

• Width and depth of the greater sciatic notch were found to be unreliable for sex determination.
• The posterior angle demonstrated the highest accuracy (75-88% for males, 92-100% for females).
• Posterior segment length and Index II also showed high accuracy, particularly for female bones (95-97%).

Conclusions:

• The posterior angle of the greater sciatic notch is the most effective parameter for sex determination from hip bones.
• The posterior part of the greater sciatic notch shows greater widening in females.
• Established demarking points can identify sex with 100% accuracy.