Table 2. Descriptive statistics of depth of optic canal and sphenoid ridge from the pterion.

Dimension measured	Mean±SD (mm)		P-value
	Male	Female
Depth of right optic canal	43.1±2.58	41.8±4.34	0.180
Depth of left optic canal	43.3±3.57	41.5±4.41	0.125
Depth of right sphenoid ridge	10.7±2.7	10.1±2.39	0.489
Depth of left sphenoid ridge	10.8±3.15	10.4±1.93	0.603

P<0.05 is considered statistically significant.