Distribution of ICAS lesions in the two cohorts
| OXVASC (n=1287) | CUHK-SR (n=691) | |||
| No of patients with the arteries affected/no of patients with the artery imaged (%) | No of arteries affected/total no of arteries imaged (%) | No of patients with the arteries affected/ no of patients with the artery imaged (%) | No of arteries affected/total no of arteries imaged (%) | |
| Any ICAS in anterior circulation | 155/1287 (12.0)* | 248/691 (35.9)* | ||
| Any ICAS in posterior circulation | 155/1287 (12.0)† | 121/689 (17.6)† | ||
| ICAS in both anterior and posterior circulations | 53/1287 (4.1)‡ | 72/689 (10.4)‡ | ||
| ICAS in individual arteries | ||||
| Intracranial ICA | 68/1287 (5.3) | 90/2574 (3.5) | 83/691 (12.0) | 107/1382 (7.7) |
| ACA (A1+A2) | 30/1287 (2.3) | 31/2574 (1.2) | 68/691 (9.8) | 75/1382 (5.4) |
| MCA (M1+M2) | 85/1287 (6.6) | 93/2574 (3.6) | 184/691 (26.6) | 228/1382 (16.5) |
| PCA (P1+P2) | 83/1287 (6.4) | 98/2574 (3.8) | 102/691 (14.8) | 116/1382 (8.4) |
| VA (V4) | 82/1287 (6.4) | 97/2574 (3.8) | 15/334 (4.5) | 19/668 (2.8) |
| BA | 13/1287 (1.0) | 13/1287 (1.0) | 23/689 (3.3) | 23/689 (3.3) |
*P<0.001 for comparison between the two cohorts.
†P=0.001 for comparison between the two cohorts.
‡P<0.001 for comparison between the two cohorts.
ACA, anterior cerebral artery; BA, basilar artery; CUHK-SR, the Chinese University of Hong Kong Stroke Registry; ICA, internal carotid artery; ICAS, intracranial atherosclerotic stenosis; MCA, medial cerebral artery; OXVASC, Oxford Vascular Study; PCA, posterior cerebral artery; VA, vertebral artery.