Malocclusion in Elementary School Children in Beirut: Severity and Related Social/Behavioral Factors

Table 3

Percentage distribution of malocclusion characteristics in public and private school children.

Measures	School type		value^*
	Public; ()	Private; ()
Overjet (%)
1-2 [ideal]	27.4	36.3	0.022
3-4 [mild]	46.2	45.0
>4 [mod-sev]	26.4	18.7
Mean OJ (mm)	3.71 ± 1.77	3.41 ± 1.7	0.032
Anterior crossbite (%)
0 [mild]	5.23	0.9	0.008
−1 to −2 [moderate]	5.5	6.6
−3 to −4 [severe]	0.3	0.9
<−4 [extreme]	0.0	0.0
Occlusion^** (%)
I	72.93	77.57	0.002
II	23.69	16.96
III	3.38	5.45
Midline diastema (>2 mm)	16.1	10.5	0.036

Chi-square.
Cl I, Cl II, and Cl III classified based on OJ (ideal: 1–4; >4: Cl II; reverse overjet: Cl III).