Table 1: Characteristics of the different groups of patients according to occlusion, gender and age.

- Class I Class II Class III Normal Total
Female 181 (54.4%) 67 (20.1%) 20 (6%) 65 (19.5%) 333 (100%)
Male 107 (56.9%) 43 (22.9%) 10 (5.3%) 28 (14.9%) 188 (100%)
Mean age (SD) 16.18 (1.8) y 15.73 (1.8) y 15.83 (1.9) y 16.55 (1.6) y -