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Table 3 Normative need (IOTN DHC) and ethnicity

From: Ethnic variations in orthodontic treatment need in London schoolchildren

Treatment need IOTN DHC White Black Indian Chinese Mixed (others)
No need for treatment 1–2 878
(69.0)
213
(72.9)
365
(65.2)
54
(62.1)
94
(69.6)
Moderate/Borderline need 3 208
(16.4)
40
(18.6)
104
(18.6)
19
(21.8)
25
(18.5)
Need for treatment 4–5 186
(14.6)
39
(13.4)
91
(16.3)
14
(16.1)
16
(11.9)
Total   1272
(100.0)
292
(100.0)
560
(100.0)
87
(100.0)
135
(100.0)