Table 2. Craniofacial measures used in the UMMA data set.

Variable no.	Description
1	Nasal height
2	Nasal bone height
3	Piriform aperture height
4	Nasion prosthion length
5	Nasion basion
6	Basion prosthion
7	Superior nasal bone width
8	Simotic width
9	Inferior nasal bone width
10	Nasal breadth
11	Simotic subtense
12	Inferior simotic subtense
13	FOW subtense at nasion
14	MOW subtense at rhinion
15	Bizygomatic breadth
16	Glabella opisthocranion
17	Maximum cranial breadth
18	Basion bregma
19	Basion rhinion
20	Width at 13 (fmt fmt)
21	Width at 14
22	IOW subtense at nasion
23	Width at 22 (fmo fmo)
24	Minimum nasal tip elevation

Variables 8, 12, 13, 19, 20, and 24 are defined in ref. 26. Variable 11 is defined in ref. 27. All of the remaining variables are according to ref. 28.