Table 3.

Multiple logistic regression analysis showing association between presence of headache and various composite endpoints.

	Odd ratio [95% CI]	p-value
A. Hemorrhagic endpoints
Presence of headache		0.717
No headache	Reference
Isolated headache	0.70 [0.29–1.68]	0.42
Concurrent headache	0.83 [0.33–2.08]	0.069
Age	1.00 [0.97–1.04]	0.69
Morphology
Steno-occlusion	Reference
Dilatation	8.00 [3.45–18.52]	< 0.001
B. Ischemic endpoints
Presence of headache		0.013
Isolated headache	Reference
No headache	3.32 [0.91–12.06]	0.069
Concurrent headache	6.40 [2.03–20.19]	0.002
Age	1.04 [1.01–1.08]	0.03
Morphology
Steno-occlusion	Reference
Dilatation	1.93 [0.25–1.32]	0.19
Lesion location
VA	Reference
BA involvement	7.57 [3.24–17.70]	< 0.001
C. Dynamic arterial changes
Presence of headache		0.004
No headache	Reference
Isolated headache	3.98 [1.72–9.18]	0.001
Concurrent headache	1.59 [0.75–3.38]	0.226
Age	0.94 [0.91–0.97]	< 0.001
Morphology
Steno-occlusion	Reference
Dilatation	1.19 [0.60–2.27]
HTN	0.49 [0.26–0.93]	0.029

VA vertebral artery, BA basilar artery, HTN hypertension.