Sample characteristics
| Group 1 | Group 2 | Group 3 | Group 4 | |
|---|---|---|---|---|
| Sex | ||||
| Male | 8 | 14 | 13 | 10 |
| Female | 2 | 7 | 15 | 16 |
| Mean age (yr) | 28.90 | 22.09 | 22.48 | 22.46 |
Group 1: the control group, Group 2: the group that had one-jaw surgery, Group 3: the group that had two-jaw surgery for mandibular protrusion, Group 4: the group that had two-jaw surgery for facial asymmetry.