Factors influencing aneurysm occlusion
| Variable | All aneurysms (n=98) | WEB only (n=71) | ||||
| Adequate occlusion (n=82) | Aneurysm remnants (n=16) | P values | Adequate occlusion (n=64) | Aneurysm remnants (n=7) | P values | |
| Female sex | 55 (86%) | 9 (14%) | 0.4 | 48 (100%) | 0 (0%) | <0.01 |
| Age | 58.5±11.4 | 61.0±16.8 | 0.5 | 58.7±11.9 | 60.6±20.1 | 0.4 |
| Ruptured aneurysms | 26 (81%) | 6 (19%) | 0.7 | 21 (84%) | 4 (16%) | 0.2 |
| Recurrent aneurysms | 4 (50%) | 4 (50%) | 0.02 | – | – | – |
| Initial intra - aneurysmal partial thrombosis | 2 (33%) | 4 (67%) | <0.01 | 1 (100%) | 0 (0%) | 1.0 |
| Lobular shape | 12 (92%) | 1 (8%) | 0.7 | 9 (100%) | 0 (0%) | 0.6 |
| Aneurysm location | ||||||
| AcomA | 20 (77%) | 6 (23%) | 0.3 | 16 (89%) | 2 (11%) | 1.0 |
| MCA | 13 (100%) | 0 (0%) | 0.1 | 11 (100%) | 0 (0%) | 0.6 |
| ICA | ||||||
| Terminus | 3 (75%) | 1 (25%) | 0.5 | 2 (100%) | 0 (0%) | 1.0 |
| Paraophthalmic | 8 (89%) | 1 (11%) | 1.0 | 4 (80%) | 1 (20%) | 0.4 |
| PcomA | 6 (86%) | 1 (14%) | 1.0 | 4 (100%) | 0 (0%) | 1.0 |
| BA | 28 (80%) | 7 (20%) | 0.5 | 24 (86%) | 4 (14%) | 0.4 |
| Bifurcation location | 64 (82%) | 14 (18%) | 0.5 | 53 (90%) | 6 (10%) | 1.0 |
| Aneurysm size | ||||||
| Dome width (mm) | 7.0±2.9 | 10.5±6.1 | 0.04 | 6.9±2.7 | 6.8±2.1 | 0.9 |
| Height (mm) | 7.3±3.2 | 11.8±7.9 | 0.04 | 7.0±2.4 | 6.4±1.9 | 0.6 |
| Maximum diameter (mm) | 8.0±3.4 | 13.3±8.0 | 0.02 | 7.7±2.8 | 7.6±1.5 | 1.0 |
| Neck width (mm) | 4.4±1.6 | 5.7±2.6 | 0.08 | 4.3±1.4 | 4.0±0.5 | 0.2 |
| D/N ratio | 1.6±0.6 | 2.0±1.4 | 0.3 | 1.6±0.5 | 1.7±0.5 | 0.8 |
| Aspect ratio | 1.8±1.0 | 2.2±1.3 | 0.2 | 1.7±0.7 | 1.6±0.6 | 0.7 |
| W/H ratio | 1.0±0.3 | 1.0±0.5 | 0.8 | 1.0±0.3 | 1.1±0.4 | 0.4 |
| Wide neck | 73 (82%) | 16 (18%) | 0.3 | 56 (89%) | 7 (11%) | 1.0 |
| WEB treatment | ||||||
| WEB only | 67 (88%) | 9 (12%) | 0.03 | – | – | – |
| Additional coiling | 5 (50%) | 5 (50%) | <0.01 | – | – | – |
| Additional stents | 11 (69%) | 5 (31%) | 0.08 | – | – | – |
| WEB type | ||||||
| WEB DL | 11 (73%) | 4 (27%) | 0.3 | 8 (100%) | 0 (0%) | 1.0 |
| WEB SL | 54 (83%) | 11 (17%) | 1.0 | 42 (86%) | 7 (14%) | 0.09 |
| WEB SLS | 17 (94%) | 1 (6%) | 0.3 | 14 (100%) | 0 (0%) | 0.3 |
| Immediate incomplete occlusion | 32 (76%) | 10 (24%) | 0.08 | 25 (78%) | 7 (22%) | <0.01 |
AcomA, anterior communicating artery; BA, basilar artery;DL, double layer; D/N, dome-to-neck ratio; ICA, internal carotid artery; MCA, middle cerebral artery; PcomA, posterior communicating artery; SL, single layer; SLS, single layer sphere.; W/H, width-to-height ratio.