| Carotid artery disease | No (%) |
| Normal | 126 (31%) |
| Mild ≤ 50% stenosis | 54 (14%) |
| Moderate = 51% - 74% stenosis | 24 (6%) |
| Severe ≥ 75% stenosis | 16 (4%) |
| Others = atheromatous changes without stenosis | 182 (45%( |