Table 1 Difference of ICAS and ECAS by gender
| Â | Women | Men | p value |
|---|---|---|---|
Cerebral atherosclerosis | 1514 | 1084 | 0.06 |
 Normal, n(%) | 1421(93.9%) | 1011(93.3%) |  |
 ICAS only | 68(4.5%) | 42(3.9%) |  |
 ECAS only | 22(1.5%) | 22(2.0%) |  |
 ICAS and ECAS | 3(0.2%) | 9(0.8%) |  |
ECAS, n(%) | 1514 | 1084 | <0.001 |
 Normal | 999(66.0%) | 528(48.7%) |  |
 IMT | 151(10.0%) | 136(12.5%) |  |
 Stenosis(<50%) | 339(22.4%) | 389(35.9%) |  |
 Stenosis (≥50%) | 25(1.7%) | 31(2.9%) |  |
Distribution of ICAS, n(%) | 1514 | 1084 | 0.99 |
None | 1443(95.3%) | 1033(95.3%) | Â |
Anterior Circulation | 47(3.1%) | 33(3.0%) | Â |
Posterior Circulation | 14(0.9%) | 11(1.0%) | Â |
Anterior and posterior Circulation | 10(0.7%) | 7(0.6%) | Â |