Aneurysm characteristics (n=945) | N (%) or mean±SD |
Status | |
Ruptured | 614 (65.0) |
Unruptured | 331 (35.0) |
Aneurysm size* | |
<10 mm | 816 (86.3) |
≥10 mm | 129 (13.7) |
Wide neck† | |
Yes | 557 (58.9) |
No | 388 (41.1) |
Aneurysm location | |
ACA/Acom | 363 (38.4) |
MCA | 198 (20.9) |
ICA intradural | 290 (30.7) |
ICA extradural | 14 (1.5) |
VB | 80 (8.5) |
Aneurysm shape‡ | |
Regular | 269 (28.5) |
Irregular | 676 (71.5) |
Treatment | |
Coiling | 516 (54.6) |
BAC | 429 (45.4) |
*Maximum diameter.
†Wide neck defined as neck size ≥4 mm and/or dome to neck ratio <2.
‡Regular when there was a single sac with smooth margin and irregular if there was a single sac with irregular margin and/or a daughter sac and/or a multilobulated aneurysm.
ACA/Acom, anterior cerebral/communicating artery; BAC, balloon-assisted coiling; ICA, internal carotid artery; MCA, middle cerebral artery; VB, vertebrobasilar.