Table 1. Comparison of measurements related to specific non-bilateral maxillary variables with reference to the sex categories.

Parametera	Sex		P-valueb
	Male (♂) (n = 86)	Female (♀) (n = 126)
Maxillary complex length (mm)	53.81 ± 3.45	50.27 ± 3.14	<0.001
Maximum inter-maxillary width (mm)	67.67 ± 6.23	63.99 ± 5.51	<0.001
Length of NPC at sagittal plane (mm)	12.92 ± 2.72	11.08 ± 2.44	<0.001
NPC angle at sagittal plane (degrees)	69.48 ± 8.18	67.42 ± 9.58	0.104
Minimum anterosuperior buccal bone thickness (mm)	6.78 ± 1.68	5.91 ± 1.66	<0.001
Anteroposterior width of IF (mm)	3.92 ± 0.70	3.63 ± 0.85	0.009
Anteroposterior width of NPF (mm)	3.70 ± 1.85	3.45 ± 1.63	0.314

Abbreviations: NPC, nasopalatine canal; IF, incisive foramen; NPF, nasopalatine foramen

^aValues are given as mean ± SD

^bTwo-sided unpaired t-test