Transsphenoidal Optic Canal Decompression for Traumatic Optic Neuropathy Assisted by a Computed Tomography Image Postprocessing Technique

Table 3

Comparison of the diameter of each segment of the optic canal.

	Group I	Group J	Mean difference (I-J)	Std. error	Sig.	95% interval confidence
						Lower bound	Upper bound
LSD	Orbital mouth	Cranial mouth	−0.8386	0.1912	0.0000	−1.2208	−0.4565
		Midpiece	0.1614	0.1912	0.4019	−0.2208	0.5435
	Cranial mouth	Orbital mouth	0.8386	0.1912	0.0000	0.4565	1.2208
		Midpiece	1	0.1912	0.0000	0.6179	1.3821
	Midpiece	Orbital mouth	−0.1613	0.1912	0.4019	−0.5435	0.2208
		Cranial mouth	−1	0.1912	0.0000	−1.3821	−0.6179

The midpiece of optic canal is the narrowest, which has significant difference to the cranial mouth and orbital aperture ().