Anthropometric measurements used in this study
| Head width | eu-eu | eurion to eurion |
|---|---|---|
| Skull base width | t-t | tragion to tragion |
| Minimum frontal width | mf-mf | frontotemporale to frontotemporale |
| Upper facial width | zy-zy | zygion to zygion |
| Lower facial width | go-go | gonion to gonion |
| Head length | g-op | glabella to opisthocranion |
| Upper facial depth | t-n | tragion to nasion |
| Midfacial depth | t-sn | tragion to subnasale |
| Lower facial depth | t-gn | tragion to gnathion |
| Nasal protrusion | sn-prn | subnasale to pronasale |
| Total facial height | n-gn | nasion to gnathion |
| Upper facial height | n-sn | nasion to subnasale |
| Nasal width | al-al | alare to alare |
| Mouth width | ch-ch | cheilion to cheilion |
| Inner canthal distance | en-en | endocanthion to endocanthion |
| Outer canthal distance | ex-ex | exocanthion to exocanthion |
| Ear width | pra-pa | preaurale to postaurale |
| Ear length | sa-sba | superaurale to subaurale |
| Maxillary arc | t-sn-t | tragion to subnasale to tragion |
| Mandibular arc | t-gn-t | tragion to gnathion to tragion |
| Head circumference | OFC | maximum circumference in horizontal plane at level of glabella and opisthocranion |