Table 2.

Class I, Class II, Class III, overjet, openbite prevalence for each study. (* the anomaly considered was not investigated).

	I Class	II Class	III Class	Overjet	Openbite
1	61.4%	24%	10%	63.8% 1–4 mm 17.2% 4–6 mm 10% > 6 mm	*
2	80.3%	6.3% (3.9% I° division, 2.4% II° division)	1.6%	30% (increased 15.6%; reduced 15.2%)	7.1%
3	86.3%	19.50%	3.9%	increased 48%	1.4%
4	64.3%	17.6%	8%	increased 11.8%	1.6%
5	55.3%	18.8%	1.4%	increased 24.7%, reduced nell’1.8%	2.9%
6	73%	7.10%	19.4%	increased 63%	1.9%
7	46.8%	32.6% (19% divisions)	1.6%	increased 14.1%, reduced 2.2%	18%
8	42.7%	15.9%	14.1%	30.90%	2.6%
9	68.4%	27.7%	2.8%	increased 21.09%, reduced 0.4%	3.46%
10	67.13%	I division 14.53%, II division 10.7%	7.61%	increased 25.6%, reduced 17%	21.1%
11	52.8%	31.8%	15.4%	increased 22.2% reduced 11.4%	4.6%
12	93.6%	4.4%	2%	*	16.1%
13	89.45%	8.37%	2.14%	Increased 33.71% reduced 18.07%	35.97%
14	34.9%	I division 40% II division 4.7%	10.3%	increased 25.1% reduced 10.4%	8.2%