Table 3.

Change in diagnostic accuracy (% with correct diagnosis) from luminal imaging to luminal + vessel-wall MRI.

		Imaging Modality
Group*	No.	LI	LI+IVWM	P-value†
All	76	24 (31.6)	66 (86.8)	<0.001
ICAD	38	12 (31.6)	31 (81.6)	0.009
MMD	30	11 (36.7)	27 (90.0)	0.016
V	8	1 (12.5)	8 (100.0)	0.25

ICAD = intracranial atherosclerotic disease; LI = luminal imaging; MMD = moyamoya disease; V = vasculitis; IVWM = vessel wall imaging;

^*Group defined as either all cases or based on the final clinical diagnosis;

^†Permutation test based on McNemar's test statistic.