Table 2.

Pairwise comparison among growth phases (a) and dentoskeletal classifications (b) of forehead protrusion

(a)	P
Index	Child-Teenager	Child-Adult	Teenager-Adult
All samples	<0.001**	<0.001**	0.025*
Sex
Male	<0.001**	<0.001**	< 0.001**
Female	0.037*	0.025*	0.908
Dentoskeletal Classification
Class I	0.004*	<0.001**	0.010*
Class II	<0.001**	<0.001**	0.325
Class III	0.563	0.213	0.526
(b)	P
Index	Class I-Class II	Class I-Class III	Class II-Class III
All samples	0.465	<0.001**	0.009*
Sex
Male	0.483	0.004*	0.031*
Female	0.053	0.213	0.526
Age
Child	0.170	0.165	0.005*
Teenager	0.299	0.075	0.019*
Adult	0.953	<0.001**	<0.001**

SD standard deviation

*Statistical significance (P < 0.05) as determined by the ANOVA test

**Highly statistically significant (P < 0.001)