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Table 1: Demographic characteristics and clinical measurements of patients with MMD
Left Hemisphere (n = 38) Right Hemisphere (n = 41)
Age (years) 41.63 ± 12.31
Sex (male/female) 18/26
Illness duration (months) 45.85 ± 76.76
Family history (y/n) 3/31
Initial manifestation on imaging 
 Ischemic onset 11 6
 Hemorrhagic onset 3 9
DWI (positive/negative) 7/31 3/38
MCA (stenosis/occlusion) 11/27 8/33
PCA (normal/stenosis/occlusion) 25/8/5 29/8/4
Mean Suzuki stage IV (III–V) IV (III–V)
CBF of MCA territory (mL/100  g/min) 47.52 ± 11.39 46.50 ± 15.43
Scoring of leptomeningeal  collaterals 
 FVH 2.91 ± 1.59 2.68 ± 1.52
 CEMR-based ivy sign score 7.87 ± 2.18 7.55 ± 2.20
 DSA score 2.63 ± 1.84 2.65 ± 1.88
Note:—Continuous data were presented as mean ± SD, and categorical data were presented as median (IQR).

	Left Hemisphere (n = 38)	Right Hemisphere (n = 41)
Age (years)	41.63 ± 12.31
Sex (male/female)	18/26
Illness duration (months)	45.85 ± 76.76
Family history (y/n)	3/31
Initial manifestation on imaging
Ischemic onset	11	6
Hemorrhagic onset	3	9
DWI (positive/negative)	7/31	3/38
MCA (stenosis/occlusion)	11/27	8/33
PCA (normal/stenosis/occlusion)	25/8/5	29/8/4
Mean Suzuki stage	IV (III–V)	IV (III–V)
CBF of MCA territory (mL/100 g/min)	47.52 ± 11.39	46.50 ± 15.43
Scoring of leptomeningeal collaterals
FVH	2.91 ± 1.59	2.68 ± 1.52
CEMR-based ivy sign score	7.87 ± 2.18	7.55 ± 2.20
DSA score	2.63 ± 1.84	2.65 ± 1.88