A preliminary report on the analysis of human remains from Non Pa Kluay archaeological site, Khon Kaen Province in the excavation season 1984-1985 consisted of nineteen individuals of the Early Metal Age approximately 1,800-4,000 BP.

According to the age and sex determination results, this sample group consisted of the infant to adult individuals, fifteen individuals divided into six males and nine are female, and life expectancy at birth estimated to be 24.6 years. These skulls tend to be longer with straight faces, broad palates, and rocker jaw mandibles. Their teeth are smaller than modern Thais, most upper incisors are shovel-shaped and there are some cases of a peg-shaped tooth and tooth winging. Moreover, the carious lesions, impacted teeth and periodontal diseases are presented with this group.

The estimated stature of males ranges between 162-173 centimeters and for females ranges between 140-163 centimeters. The population of Non Pa Kluay had relatively short forearms when compared with the lengths of upper arms and some adult individuals had some paleopathology lesions like as degenerative changes in the limb bones and vertebrae, and porotic hyperostosis or thickening of the cranial vault bones that quite possibly associated with iron-deficiency anemia. In summary, the individuals of Non Pa Kluay are biologically similar to the other prehistoric populations in Northeast Thailand.