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

Table 1

Assessment of orthodontic treatment need and complexity by gender according to the Index of Complexity, Outcome, and Need (ICON).

Variable	Frequency (%)
	Male	Female	Total
Icon assessment score
<43	169 (56.5)	210 (67.1)	379 (61.9)
≥43	130 (43.5)	103 (32.9)	233 (38.1)
Total	299 (100)	313 (100)	612 (100)
Mean	43.1 ± 26.3	36.3 ± 23.8	39.7 ± 25.3
Student’s 𝑡 statistic = 3.37, 𝑃=0.001
Complexity grade
Very difficult	45 (15.1)	24 (7.7)	69 (11.3)
Difficult	33 (11.0)	30 (9.6)	63 (10.3)
Moderate	26 (8.7)	20 (6.4)	46 (7.5)
Mild	82 (27.4)	91 (29.1)	173 (28.3)
Easy	113 (37.8)	148 (47.3)	261 (42.6)
Total	299 (100)	313 (100)	612 (100)
𝜒^2=12.16, 𝑑𝑓=4, 𝑃=0.02