Aneurysm size, location, and treatment
| Characteristic | Total | IPR (%) | p Value |
| Total no of aneurysms | 1406 | 20 (1.4) | |
| Dome size | 0.0028 | ||
| ≥5 mm | 910 | 8 (0.9) | |
| <5 mm | 385 | 12 (3.1) | |
| Neck size | 0.11 | ||
| ≥4 mm | 481 | 16 (3.3) | |
| <4 mm | 814 | 4 (0.5) | |
| Recurrent aneurysm | 111 | 0 (0.0) | 0.19 |
| Location | 0.0019 | ||
| PcomA | 178 | 4 (2.2) | |
| ICA | 766 | 6 (0.8) | |
| AcomA | 120 | 8 (6.6) | |
| Basilar tip | 148 | 2 (1.4) | |
| Other | 194 | 0 (0.0) | |
| Treatment technique | 0.42 | ||
| Coil only | 340 | 6 (1.8) | |
| Stent-assisted coiling | 468 | 4 (0.9) | |
| Balloon-assisted coiling | 598 | 10 (1.7) |
Boldface type indicates statistical significance. The size of recurrent aneurysms was not measured.
AcomA, anterior communicating artery; PcomA, posterior communicating artery; SCA, superior cerebellar artery; ICA, internal carotid artery excluding the PcomA and anterior choroidal artery.