Table 1. Prevalence of Class I, II and III Malocclusion in Different Ethnic Groups.

Author, year	Ethnicities	Sample size	Class I (a + b)** (%)	Class II (a + b)*** (%)	Class III (%)
Angle, 1907	Caucasians [17]	1,000	69	19 + 4	3.40
Altemus, 1959	Black American [18]	3,280	83	12	5
Cohen, 1970	Blacks/Whites [19]	410/349	71/53.6	11.4/33.6	6.3/4.7
Garner, 1985	Black American [16]	447	27 + 44	16	8.70
Garner, 1985	Kenyan [16]	471	16.8 + 51.7	7.90 + 0	16.80
Phaphe, 2012	Urban Indian [20]	1,000	18	30.1	1.60
Steigman, 1983	Israeli Arab [21]	803	85	8.5 + 1.7	1.3
Silva, 2001	Latino [22]	507	62.9 + 6.5	21.5	9.1
Lew, 1993	Chinese [23]	1,050	7.1 + 58.8	21.5	12.6
Garbin, 2010	Brazilian [24]	734	55.92	42.86	1.22
Hamdan, 2001	Jordanian [25]	320	62.5	21.5	16
Average			68.7	20.9	7.2

**Class I (a + b) = class I neutrocclusion + class I malocclusion. ***Class II (a + b) = class II Div I + class II Div II.