Orthodontic Treatment Need and Complexity among Nigerian Adolescents in Rivers State, Nigeria

Table 3

Associations between orthodontic treatment need and complexity.

Assessment according to the ICON	Complexity grade
	Very difficult	Difficult	Moderate	Mild	Easy	Total
Need	69 (29.6)	63 (27.0)	45 (19.3)	56 (24.0)	0 (0)	233
No need	0 (0)	0 (0)	1 (0.3)	117 (30.9)	261 (68.9)	379
Total	69	63	46	173	261	612
𝜒^2=447.22, 𝑑𝑓=4, 𝑃=0.00.