Background: The identification of highly decomposed corpses or skeletons remains a significant challenge for forensic medical examiners. The pelvic bone, recognized for its reliability in sex determination, is frequently utilized through visual assessment as an initial step in such cases. However, the subjectivity of this method has prompted research into more accurate and objective approaches than traditional anatomical morphological evaluations. Objective: The research was aimed to identify practical osteometric parameters of the greater sciatic notch, measured using a postmortem computed tomographic (PMCT) program, that have significant differences between male and female adults and provide high accuracy for sex determination in the Thai population. In addition, equation with high accuracy for sex determination using discriminant function analysis (DFA) was also developed. Materials and methods: This study analyzed 385 Thai adults aged over 20, whose postmortem computed tomography (PMCT) scans included the hip region with an intact greater sciatic notch. The sample comprised 129 females and 256 males. The analyzed 6 osteometric parameters include two distances: PIIS-IS; the di
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