TABLE 1.

Demographic and pre-treatment characteristics.

	Younger	Older
	n = 32	n = 52
Gender
Male	11 (34%)	12 (23%)
Female	21 (66%)	40 (77%)
Pretreatment
ANB (°)	6.7 ± 2.4	5.9 ± 2.2
Co-Pg (mm)	113.3 ± 8.3	115.0 ± 7.4
GoGn-SN (°)	37.9 ± 10.5	32.6 ± 8.2
N-Me (mm)	126.1 ± 9.7	121.7 ± 8.9
Surgery type
Mn advance only	16 (50%)	44 (85%)
Mn adv + Mx up	16 (50%)	8 (15%)
Age at surgery (years)	15.9 ± 1.7	34.9 ± 9.6
Male (range)	16–19	20–46
Female (range)	13–17	19–54
Surgery changes
Genioplasty also	16 (50.0%)	8 (15.4%)
Co-Pg (mm)	7.1 ± 3.4	5.7 ± 2.8
Change in Pg position      Horizontal (mm)	8.2 ± 5.8	4.8 ± 4.1
Vertical (mm)	1.0 ± 5.9	3.8 ± 2.8
GoGn-SN change (°)	−3.1± 5.5	0.5 ± 3.5
Follow-up (years)	6.8 ± 2.6	6.9 ± 3.0
Range	4.5–14.9	4.8–20.2

Mx = maxilla; Mn = mandible; adv = advance