Table 2

Baseline aneurysm characteristics

Characteristics
Aneurysm rupture status, n/N (%)
 Unruptured60/63 (95.2%)
 Ruptured3/63 (4.8%)
Aneurysm location, n/N (%)
 Anterior communicating artery15/64 (23.4%)
 Basilar artery apex4/64 (6.3%)
 Middle cerebral arteries
 Internal carotid artery (ICA) terminus
19/64 (29.7%)
8/64 (12.5%)
 ICA, cavernous segment3/64 (4.7%)
 ICA, ophthalmic segment3/64 (4.7%)
 ICA, posterior communicating segment3/64 (4.7%)
 ICA, hypophyseal segment3/64 (4.7%)
 Posterior communicating artery3/64 (4.7%)
 Anterior cerebral artery2/64 (3.1%)
 Posterior inferior cerebellar artery1/64 (1.6%)
Aneurysm type, n/N (%)
 Sidewall15/64 (23.4%)
 Bifurcation or terminal49/64 (76.6%)
Aneurysm size, n/N (%)
 Large: > 10  mm2/64 (3.1%)
 Medium: 5–10  mm37/64 (57.8%)
 Small: < 5  mm25/64 (39.1%)
Mean aneurysm width, mean±SD (range)5.6±1.8 mm (3.6–14.9 mm)
 Bifurcation or terminal aneurysms5.7±2.0 mm (3.6–14.9 mm)
 Sidewall aneurysms5.2±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 aneurysms3.9±1.1 mm (1.9–8.7 mm)
 Sidewall aneurysms3.5±0.7 mm (2.4–5.3 mm)
Dome-to-neck ratio
 Bifurcation or terminal aneurysms1.46:1
 Sidewall aneurysms1.49:1