Table 2. Diameters and lengths of the extracranial, interosseous, and intracranial segments of the middle meningeal artery subject to shape of skull and side^a .

	EC		IO		IC
	Diameter	Length	Diameter	Length	Diameter	Length
Dolichocephalic CIb ≤ 74.9%	2.77 ± 0.54**	21.46 ± 0.57*	2.46 ± 0.31**	5.62 ± 0.15*	2.33 ± 1.13 **	30.43 ± 20.48NS
Mesocephalic CIb (75–79.9%)	2.96 ± 0.36*	21.24 ± 1.04*	2.61 ± 0.48**	4.73 ± 0.18*	2.45 ± 0.52***	20.76 ± 20.83NS
Brachycephalic CIb ≥ 80%	2.38 ± 0.3**	20.23 ± 0.68**	2.12 ± 0.44***	4.13 ± 0.21**	2.04 ± 0.43**	30.82 ± 10.86NS

Abbreviations: CI, cranial index; EC, extracranial, IC, intracranial; IO, interosseous.

^aMean (μ) ± SD (σn-1), mm.

^bConfidence interval for CI (0.9140–0.9464) at p ≤ 0.05 significance level.

Significance levels: ***p < 0.001; ** p < 0.01; * p < 0.5; NS, no statistical significance.