Table 1 Demographical characteristics of the cases and controls
|  | Male/Female | Mean age (SD) | Mean ANB(°, SD) | Mean wits appraisal (mm, SD) |
|---|---|---|---|---|
Case | 39/57 | 20.49 ± 6.02 | − 3.14 ± 2.23 | 3.95 ± 2.89 |
Control | 44/59 | 21.24 ±  6.19 | 2.93 ± 1.32 | −4.24 ± 3.89 |