Incidence and mean size of all ruptured intracranial aneurysms (mm)
| Location of ruptured aneurysm | All aneurysms (incidence) (%) | All patients (mean size) | Group 1 (incidence) (%) | Group 1 (mean size) | Group 2 (incidence) (%) | Group 2 (mean size) |
|---|---|---|---|---|---|---|
| ACOM | 29.8 | 4.6±2.5 | 33.9 | 4.5±3.6 | 20.4 | 5.2±2.3 |
| PCOM | 18.2 | 6.4±3.0 | 18.2 | 6.6±4.3 | 18.1 | 5.8±2.8 |
| ICA | 16.9 | 6.6±5.3 | 12.2 | 7±8.1 | 27.6 | 6.2±4.3 |
| MCA | 12.1 | 7.5±3.3 | 10.8 | 7.7±6.8 | 15.0 | 7.3±6.0 |
| Basilar | 7.5 | 6.8±3.1 | 8.7 | 6.7±4.2 | 4.7 | 7.0±3.3 |
| Pericallosal | 5.6 | 5.1±4.5 | 6.6 | 5.6±7.7 | 3.1 | 2.8±1.3 |
| PICA | 4.6 | 3.8±1.5 | 5.6 | 3.8±2.4 | 2.4 | 4.3±1.2 |
| Others | 5.3 | 5.5±3.3 | 4 | 8.7 |
ACOM, anterior communicating artery; ICA, internal carotid artery; MCA, middle cerebral artery; PCOM, posterior communicating artery; PICA, posterior inferior cerebellar artery.