Table 2

	Nasal septum deviation		P-value^d
	Presence	Absence
	N (%)	N (%)
APP	112 (22.4)	41 (8.2)	0.000^a
PPP	20 (4)	10 (2)	0.611^b
APP and PPP	4 (0.8)	3 (0.6)	1^c

^aPearson Chi-square test; ^bYates's continuity correction; ^cFisher's exact test.
^dStatistically significant at level P < 0.05.
APP = alveolar process pneumatisation; PPP = palatal process pneumatisation; N = number.