Table 1

	Female	Male	P-value^a
	Presence	Presence
	N (%)	N (%)
APP	75 (15)	78 (15.6)	0.771
PPP	15 (3)	15 (3)	1
APP and PPP	12 (2.4)	11 (2.2)	0.831

^aStatistically significant at level P < 0.05 (Pearson Chi-square test).
APP = alveolar process pneumatisation; PPP = palatal process pneumatisation; N = number.