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Table 1: Demographic and clinical characteristics
Patients with MMD, Mean (SD) or No. (%) P
Good Collateral Formation (n = 23) Poor Collateral Formation (n = 22)
Sex, male 10 (43%) 12 (55%) .458
Age (yr) 30.87 (SD, 18.36) 37.05 (SD, 17.57) .256
Hypertension 8 (35%) 9 (41%) .672
Hyperlipidemia 9 (39%) 11 (50%) .463
CHD 1 (4%) 0 (0%) 1.000
Diabetes 3 (13%) 2 (10%) 1.000
Smoking 0 (0%) 3 (14%) .217
DSA interval (mo) 7.11 (SD, 1.69) 7.73 (SD, 1.91) .256
PCA involvement 4 (17%) 2 (9%) .704
Diameter of MMA (mm) 
 Ipsilateral 2.49 (SD, 0.51) 2.42 (SD, 0.4) .674
 Contralateral 2.30 (SD, 0.45) 2.19 (SD, 0.46) .417
Preoperative DSC 
 Ipsilateral rTTP (sec) 3.36 (SD, 2.07) 1.40 (SD, 1.57) .002
 Contralateral rTTP (sec) 1.72 (SD, 2.10) 1.07 (SD, 2.18) .353
 Ipsilateral CBF (mL/100 g/min) 1.04 (SD, 0.31) 1.31 (SD, 0.44) .021
 Contralateral CBF (mL/100 g/min) 1.18 (SD, 0.34) 1.24 (SD, 0.31) .540
 Ipsilateral CBV (mL/100 g) 1.77 (SD, 0.62) 2.23 (SD, 0.65) .019
 Contralateral CBV (mL/100 g) 1.89 (SD, 0.48) 2.12 (SD, 0.54) .138
Suzuki stage .775
 I–II 4 2 
 III– IV 13 17 
 V–VI 6 3 
Note:—CHD indicates coronary heart disease; DSA interval, interval from surgery to DSA examination; PCA, posterior cerebral artery.