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.