ICA | Population | Normal | < 50% |  | 50–70% | > 70% to near occlusion | Occlusion |
---|---|---|---|---|---|---|---|
Right | Study (n = 91) | 14 (15.4%) | 70 (77%) |  | 3 (3.3%) | 3 (3.3%) | 1 (1%) |
 | Matched (n = 113) | 90 (79.7%) | 17 (15%) |  | 2 (1.8%) | 3 (2.6%) | 1 (0.9%) |
Left | Study (n = 91) | 15 (16.5%) | 72 (79.2%) |  | – | 3 (3.3%) | 1 (1%) |
 | Matched (n = 113) | 95 (84%) | 16 (14.2%) |  | 1 (0.9%) | 1 (0.9%) |  |