Phattarapong Kharuhadetch; Sunitta Wattanawaragorn; Chaiwit Tiamtongon; Thawatchai Wathanyutakon; Pagorn Navic & Pasuk Mahakkanukrauh

As natural disasters or crimes, precise postmortem identification is needed especially in case of unknown human remains. The aim of the study is to assess sexual dimorphism by formulating new multivariate equations based on scapular and clavicular parameters for a modern Thai population. Eight left scapular and six left clavicular parameters were measured from 278 individuals (124 males and 124 females for training group; and 15 males and 15 females for test group) of a modern Thai population with age ranges from 19 to 101 years. All scapular and clavicular parameters were sexually dimorphic. Direct and stepwise multivariate discriminant function analysis was performed to generate models. Three direct multivariate discriminant functions showed accuracy rates from 91.1c to 92.3 % (cross-validated range from 90.3 % to 91.5 %). Similarly, three stepwise multivariate discriminant functions showed accuracy rates from 90.7 % to 92.7 % (cross-validate drange from 90.7 % to 92.7 %). Moreover, the test group showed 86.67 % to 100 % ofsexdetermination accuracy in six discriminant functions. As recommendation for sex determination by using combination of the scapular and clavicular parameters yields statistically high accuracy for sex determination. Therefore, the accuracies of these multivariate discriminant function equations obtained from scapula and clavicle can be applied for forensic sex determination, especially in modern Thais.

KEY WORD: Forensic anthropology; Sex determination; Scapula; Clavicle; Thais.

KHARUHADETCH, P.; WATTANAWARAGORN, S.; TIAMTONGON, C.; WATHANYUTAKON, T.; NAVIC, P. & MAHAKKANUKRAUH, P. Sex determination using scapular and clavicular parameters in modern Thai population. Int. J. Morphol., 40(3):768-773, 2022.