Univariate analysis for rupture of very small anterior communicating artery aneurysms
| Clinical variables | Ruptured | Unruptured | OR (95% CI) | p Value |
|---|---|---|---|---|
| N (M/F) | 134 (63/71) | 32 (19/13) | 1.6 (0.8 to 3.6) | 0.211 |
| Age (years) | 56.7±12.3 | 61.3±12.4 | 1.0 (0.9 to 1.0) | 0.058 |
| Aneurysm morphology | ||||
| Vessel size (mm) | 1.9±0.5 | 2.1±0.5 | 0.4 (0.2 to 0.8) | 0.012 |
| Aneurysm size (mm) | 2.6±0.5 | 2.4±0.7 | 1.9 (1.0 to 3.6) | 0.037 |
| Aneurysm height (mm) | 2.2±0.9 | 1.9±0.8 | 1.7 (1.0 to 2.9) | 0.038 |
| Perpendicular height (mm) | 2.0±0.8 | 1.7±0.8 | 1.6 (1.0 to 2.8) | 0.066 |
| Neck size (mm) | 2.2±0.6 | 2.2±0.8 | 0.9 (0.5 to 1.6) | 0.650 |
| Size ratio | 1.3±0.6 | 0.9±0.5 | 3.9 (1.6 to 9.1) | 0.002 |
| Aspect ratio | 1.0±0.4 | 0.8±0.4 | 2.5 (0.9 to 7.2) | 0.089 |
| Flow angle | 136.4±27.2 | 131.4±26.1 | 1.0 (0.9 to 1.1) | 0.358 |
| Vessel angle | 55.5±28.4 | 52.1±34.7 | 1.0 (0.9 to 1.1) | 0.564 |
| Aneurysm angle | 77.5±16.4 | 79.9±16.5 | 1.0 (0.9 to 1.1) | 0.466 |
| Aneurysm dome projection | 0.7 (0.3 to 1.6) | 0.406 | ||
| Anterior projection | 86 (64.2%) | 18 (56.3%) | ||
| Posterior projection | 48 (35.8%) | 14 (43.7%) | ||
| A1 segment configuration | 0.7 (0.4 to 1.2) | 0.011 | ||
| Symmetric | 48 (35.8%) | 12 (37.5%) | ||
| Dominant | 62 (46.3%) | 8 (25.0%) | ||
| Complete | 24 (17.9%) | 12 (37.5%) | ||
| Aneurysm lobulations | 2.6 (0.4 to 14.8) | 0.291 | ||
| Regular | 123 (91.8%) | 31 (96.9%) | ||
| Irregular | 6 (4.5%) | 1 (3.1%) | ||
| Daughter sac | 5 (3.7%) | 0 | ||
| Multi aneurysms | 19 (14.2%) | 3 (9.4%) | 0.9 (0.5 to 1.7) | 0.750 |