title: Craniometric study for sex determination in a Thai population.
abstract: Sex determination is an important step in biological identification from skeletal remains, especially in forensic circumstances. Many authors suggested that the morphological study was more subjective than the metric. There are various craniometric studies in different populations. They revealed that there was population-specific for the sex discriminant equation derived from each population. Thus, the present study aimed to evaluate sexual dimorphism and develop the discriminant function from 200 Thai skulls. Twenty-five standard cranial measurements were examined. The results revealed that males' cranium were statistically significant larger than females' in all measurements (P<0.05), except for minimum breadth of nasal bone. Sexual dimorphism index also expressed relatively high male/female ratio indicating great sexual dimorphism. The best practical equation for sex determination with six measurements (maximum cranial length, bizygomatic breadth, biauricular breadth, nasal height, biorbital breadth and right mastoid length) was derived from a stepwise discriminant method. This equation with 90.6% accuracy (91.1% in male and 90.0% in female) can provide valuable application utilizing in sex determination from skull in a Thai population.
authors.affiliation: Excellence in Osteology Research and Training Center (ORTC), Chiang Mai University, Chiang Mai, Thailand.; Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.; Forensic Osteology Research, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Pasuk
authors.initials: P
authors.lastname: Mahakkanukrauh
authors.affiliation: Excellence in Osteology Research and Training Center (ORTC), Chiang Mai University, Chiang Mai, Thailand.; Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.; Forensic Osteology Research, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Apichat
authors.initials: A
authors.lastname: Sinthubua
authors.affiliation: Excellence in Osteology Research and Training Center (ORTC), Chiang Mai University, Chiang Mai, Thailand.; Department of Statistics, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Sukon
authors.initials: S
authors.lastname: Prasitwattanaseree
authors.affiliation: Forensic Osteology Research, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Sitthiporn
authors.initials: S
authors.lastname: Ruengdit
authors.affiliation: Forensic Osteology Research, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Phruksachat
authors.initials: P
authors.lastname: Singsuwan
authors.affiliation: Forensic Osteology Research, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Sithee
authors.initials: S
authors.lastname: Praneatpolgrang
authors.affiliation: Forensic Osteology Research, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Phuwadon
authors.initials: P
authors.lastname: Duangto
keywords: Craniometry; Sex determination; Skull; Thai