Table 2.
Baseline aneurysm characteristics
| Characteristics | |
| Aneurysm rupture status, n/N (%) | |
| Unruptured | 60/63 (95.2%) |
| Ruptured | 3/63 (4.8%) |
| Aneurysm location, n/N (%) | |
| Anterior communicating artery | 15/64 (23.4%) |
| Basilar artery apex | 4/64 (6.3%) |
| Middle cerebral arteries Internal carotid artery (ICA) terminus |
19/64 (29.7%) 8/64 (12.5%) |
| ICA, cavernous segment | 3/64 (4.7%) |
| ICA, ophthalmic segment | 3/64 (4.7%) |
| ICA, posterior communicating segment | 3/64 (4.7%) |
| ICA, hypophyseal segment | 3/64 (4.7%) |
| Posterior communicating artery | 3/64 (4.7%) |
| Anterior cerebral artery | 2/64 (3.1%) |
| Posterior inferior cerebellar artery | 1/64 (1.6%) |
| Aneurysm type, n/N (%) | |
| Sidewall | 15/64 (23.4%) |
| Bifurcation or terminal | 49/64 (76.6%) |
| Aneurysm size, n/N (%) | |
| Large: > 10 mm | 2/64 (3.1%) |
| Medium: 5–10 mm | 37/64 (57.8%) |
| Small: < 5 mm | 25/64 (39.1%) |
| Mean aneurysm width, mean±SD (range) | 5.6±1.8 mm (3.6–14.9 mm) |
| Bifurcation or terminal aneurysms | 5.7±2.0 mm (3.6–14.9 mm) |
| Sidewall aneurysms | 5.2±1.0 mm (3.9–7.1 mm) |
| Mean aneurysm neck size, mean±SD (range) | 3.8±1.0 mm (1.9–8.7 mm) |
| Bifurcation or terminal aneurysms | 3.9±1.1 mm (1.9–8.7 mm) |
| Sidewall aneurysms | 3.5±0.7 mm (2.4–5.3 mm) |
| Dome-to-neck ratio | |
| Bifurcation or terminal aneurysms | 1.46:1 |
| Sidewall aneurysms | 1.49:1 |