Table 1.

Participant Demographics and Stenosis Characteristics of Moyamoya Patients

Demographics
	Patients (N=20)	Healthy Volunteers (N=15)
Sex (female, %)	14 (70.0%)	8 (53.3%)
Age in years (SD, range)	36.8 (9.7, 16–52)	40.9 (12.3, 22–62)*
Previous stroke (%)	9 (45.0%)	0 (0.0%)
Patient stenosis characteristics
Vessel (% for each type)	Normal	Mild-moderate	Severe
Anterior cerebral artery	12 (30.0%)	17 (42.5%)	11 (27.5%)
Middle cerebral artery	6 (15.0%)	12 (30.0%)	22 (55.0%)
Posterior cerebral artery	30 (75.0%)	10 (25.0%)	0 (0.0%)†

^*Not significant, P=0.27.

^†Posterior regions had fewer vessels with severe stenosis, P<0.001 by Fisher exact test.