Table 2.

Brain imaging and angiographic features.

Variable	Group A (n = 36)	Group B (n = 110)	Group C (n = 16)	P A vs. B	P B vs. C
Initial brain imaging
Abnormal	53%	74%	81%	0.019	0.513
Infarct	17%	32%	25%	0.134	0.682
Parenchymal haemorrhage	6%	14%	19%	0.232	0.510
Convexal SAH	33%	35%	25%	0.817	0.410
Vasogenic edema (PRES)	14%	27%	44%	0.103	0.176
Final brain Imaging
Abnormal	53%	82%	81%	0.001	0.956
Infarct	20%	39%c	25%	0.031	0.408
Parenchymal haemorrhage	6%	14%	25%	0.189	0.235
Convexal SAH	33%	41%	31%	0.419	0.461
Vasogenic oedema (PRES)	14%	29%	50%	0.069	0.093
Onset to angiography (days)	6.3 ± 5.9	7.5 ± 6.1	6.7 ± 4.5	0.298	0.706
Artery involved
Intracranial ICA	8%	17%	25%	0.205	0.466
Middle cerebral artery	78%	90%	94%	0.084	0.700
Anterior cerebral artery	67%	90%	75%	0.001	0.061
Posterior cerebral artery	56%	85%	88%	0.001	0.817
Vertebral or basilar arteries	44%	48%	56%	0.764	0.659
SCA/AICA/PICA	22%	65%	38%	<0.001	0.034
Extracranial ICA or vertebral	6%	7%	13%	0.742	0.615
Arterial segment involvement
Proximal segmenta	86%	82%	88%	0.777	0.874
Middle segmenta	77%	95%	100%	0.022	0.437
Smaller distal branches	77%	91%	88%	0.264	0.895
Angiographic appearance
Sausaging	46%	77%	38%	0.002	0.019
Segmental dilatation	23%	56%	63%	0.004	0.821
Cervical artery dissection	6%	8%	19%	0.604	0.178
Vasoconstriction severity score	10.9 ± 10.3	23 ± 14	23 ± 18	<0.001	0.977

Note: Group A, men; Group B, non-pregnant women; Group C, postpartum angiopathy.

SAH: subarachnoid haemorrhage; PRES: posterior reversible leukoencephalopathy syndrome; ICA: internal carotid artery; SCA, AICA and PICA: superior, anterior–inferior and posterior–inferior cerebellar arteries.

^aProximal arterial segments include the terminal ICA, the first-order branches of the anterior, middle and posterior cerebral arteries, and the intracranial vertebral and basilar arteries. Middle segments include the second-order branches of the anterior, middle and posterior cerebral arteries and the SCA, AICA and PICA. Bold indicates statistically significant P values.