Distribution of patients according to the degree of carotid artery stenosis
| Degree of carotid stenosis | Number of patients (n=653) |
| Normal | 238 (36.6%) |
| Mild stenosis (<50%) | 287 (44.0%) |
| Moderate stenosis (50%–69%) | 68 (10.4%) |
| Severe stenosis (70%–99%) | 46 (7.0%) |
| Occlusion | 14 (2.1%) |