Table 2 Mean scores in overall and seven domains of Oral Health Impact Profile- 14 (OHIP- 14) OHIP -14 among different types of Index of Orthodontic Treatment Need- Dental Health Component (IOTN- DHC) groups

No treatment need (Reference Group)

71 (22.0%)

2.2 ± 1.8

2.1 ± 1.6

2.6 ± 1.8

2.0 ± 1.6

2.0 ± 1.6

1.8 ± 1.6

2.4 ± 1.7

15.2 ± 10.9

Little treatment need

87 (26.9%)

3.2 ± 1.9

3.0 ± 1.6

3.8 ± 1.8***

3.0 ± 1.9

2.0 ± 1.6

2.2 ± 2.0

2.9 ± 1.8

20.2 ± 11.1*

Borderline treatment need

80 (24.8%)

3.9 ± 2.0**

3.4 ± 1.3**

4.5 ± 1.6***

3.4 ± 1.9*

2.9 ± 1.7*

2.9 ± 1.9*

3.2 ± 1.9

24.1 ± 11.2**

High Treatment need

85 (26.3%)

4.8 ± 2.0***

4.2 ± 1.7***

4.9 ± 1.7***

4.0 ± 2.0***

3.6 ± 1.9***

3.8 ± 2.2***

4.1 ± 2.0**

29.5 ± 12.5***