Table 1.

Comparison of luminal imaging and IVWI findings between vasculopathy groups.

		Final Diagnosis*			Pairwise p-values†
Variable		ICAD (N=180)	RCVS (N=128)	IVas (N=94)	ICAD vs. RCVS	ICAD vs. IVas	RCVS vs. IVas
Luminal imaging findings
Pattern of involvement‡	Concentric, n (%)	51 (28.8)	59 (46.8)	45 (48.9)	0.002	0.006	0.81
	Eccentric	126 (71.2)	67 (53.2)	47 (51.1)
IVWI findings
Pattern of involvement	Concentric	16 (8.9)	103 (80.5)	72 (76.6)	<0.001	<0.001	0.65
	Eccentric	164 (91.1)	25 (19.5)	22 (23.4)
Wall enhancement	Present	173 (96.1)	59 (46.1)	89 (94.7)	<0.001	0.66	<0.001
	Absent	7 (3.9)	69 (53.9)	5 (5.3)
Pattern of enhancement||	Focal	17 (9.8)	0 (0.0)	0 (0.0)	0.010	<0.001	0.065
	Diffuse	76 (43.9)	42 (71.2)	77 (86.5)
	Heterogeneous	80 (46.2)	17 (28.8)	12 (13.5)

ICAD = intracranial atherosclerotic disease; IVas = inflammatory vasculopathy; IVWI = intracranial vessel wall MRI; RCVS = reversible cerebral vasoconstrictive syndrome; IVWI

^*Values are no. (%); observations are reads (201 lesions × 2 raters = 402 total);

^†Test for difference in findings between the given pair of vasculopathy groups;

^‡Excluding 7 lesions where one rater did not determine eccentricity.