TABLE 3.

Risk factors associated with internal carotid artery (ICA) morphological variations

	Multivariate analysis
Risk factor	OR	95% CI	P
Age	1.04	1.02–1.06	<0.0001
Female sex	1.78	1.21–2.64	0.004
<50% ICA stenosis	1.43	0.89–2.31	0.1
≥50% ICA stenosis	0.57	0.29–1.12	0.1
Arterial hypertension	1.20	0.81–1.78	0.4
Diabetes mellitus	0.85	0.49–1.47	0.6
Previous ischemic stroke or TIA	0.96	0.61–1.52	0.9
Dizziness	0.89	0.43–1.83	0.7
Neck length	0.97	0.90–1.04	0.4

TIA Transient ischemic attack