Baseline characteristics of the 44 patients
| Age-years | |
| Median | 67.4 |
| IQR | 49–79 |
| Male sex, n (%) | 34 (77.2) |
| Stenosis ≥90%, n (%) | 27 (61.3) |
| Contralateral stenosis, n (%) | |
| ≥50 | 7 (15.9) |
| ≥60 | 7 (15.9) |
| ≥70 | 3 (7) |
| ≥80 | 5 (11.4) |
| ≥90 | 0 |
| Occlusion, n (%) | 2 (5) |
| CTP | |
| Hypoperfusion, n (%) | 21 (47.7) |
| Normal, n (%) | 23 (52.3) |
| Clinical presentation | |
| Amaurosis fugax, n (%) | 2 (5) |
| Transient ischaemic attack, n (%) | 23 (52.3) |
| Ischaemic stroke, n (%) | 9 (20.5) |
| Risk factors | |
| Hypertension, n (%) | 21 (47.7) |
| Diabetes mellitus, n (%) | 14 (31.8) |
| Coronary artery diseases, n (%) | 5 (11.4) |
| Smoking, n (%) | 6 (13.6) |
| Alcohol use, n (%) | 9 (20.4) |
| Circle of Wills | |
| Normal | 27 (61.4) |
| Variation | 17 (38.6) |
CTP, CT perfusion.