Factors influencing aneurysm recurrence
| Variable | All aneurysms (n=98) | WEB only (n=71) | ||||
| Aneurysm recurrence (n=15) | No recurrence (n=83) | P values | Aneurysm recurrence (n=8) | No recurrence (n=63) | P values | |
| Female sex | 8 (12%) | 56 (88%) | 0.3 | 6 (12%) | 42 (88%) | 1.0 |
| Age | 57.3±11.8 | 59.2±12.5 | 0.6 | 53.4±11.9 | 59.6±12.7 | 0.2 |
| Ruptured aneurysms | 7 (22%) | 25 (78%) | 0.2 | 5 (20%) | 20 (80%) | 0.1 |
| Recurrent aneurysms | 3 (37%) | 5 (63%) | 0.1 | – | – | – |
| Initial intra - aneurysmal partial thrombosis | 5 (83%) | 1 (17%) | <0.01 | 1 (100%) | 0 (0%) | 0.1 |
| Lobular shape | 0 (0%) | 13 (100%) | 0.2 | 0 (0%) | 9 (100%) | 0.6 |
| Aneurysm location | ||||||
| AcomA | 6 (23%) | 20 (77%) | 0.2 | 3 (17%) | 15 (83%) | 0.4 |
| MCA | 1 (8%) | 12 (92%) | 0.7 | 1 (9%) | 10 (91%) | 1.0 |
| ICA | ||||||
| Terminus | 0 (0%) | 4 (100%) | 1.0 | 0 (0%) | 2 (100%) | 1.0 |
| Paraophthalmic | 1 (11%) | 8 (89%) | 1.0 | 1 (20%) | 4 (80%) | 0.5 |
| PcomA | 1 (14%) | 6 (86%) | 1.0 | 0 (0%) | 4 (100%) | 1.0 |
| BA | 6 (17%) | 29 (83%) | 0.8 | 3 (11%) | 25 (89%) | 1.0 |
| Bifurcation location | 13 (17%) | 65 (83%) | 0.7 | 7 (12%) | 52 (88%) | 1.0 |
| Aneurysm size | ||||||
| Dome width (mm) | 11.0±5.9 | 7.0±2.9 | 0.02 | 7.7±1.6 | 6.8±2.7 | 0.4 |
| Height (mm) | 13.6±6.9 | 7.0±3.2 | <0.01 | 8.9±2.0 | 6.6±2.3 | 0.01 |
| Maximum diameter (mm) | 14.4±7.5 | 7.9±3.4 | 0.01 | 9.2±1.8 | 7.5±2.7 | 0.08 |
| Neck width (mm) | 5.3±2.4 | 4.5±1.7 | 0.1 | 4.0±0.7 | 4.4.±1.4 | 0.2 |
| D/N ratio | 2.3±1.4 | 1.6±0.6 | <0.01 | 2.0±0.3 | 1.6±0.5 | 0.08 |
| Aspect ratio | 2.7±1.0 | 1.7±1.0 | <0.01 | 2.3±0.5 | 1.6±0.7 | 0.01 |
| W/H ratio | 0.8±0.3 | 1.0±0.3 | 0.04 | 0.9±0.2 | 1.0±0.3 | 0.2 |
| Wide neck | 14 (16%) | 75 (84%) | 1.0 | 7 (11%) | 56 (89%) | 1.0 |
| WEB treatment | ||||||
| WEB only | 10 (13%) | 66 (87%) | 0.3 | – | – | – |
| Additional coiling | 5 (50%) | 5 (50%) | <0.01 | – | – | – |
| Additional stents | 3 (19%) | 13 (81%) | 0.7 | – | – | – |
| WEB type | ||||||
| WEB DL | 4 (27%) | 11 (73%) | 0.2 | 1 (12%) | 7 (88%) | 1.0 |
| WEB SL | 7 (11%) | 58 (89%) | 0.01 | 4 (8%) | 45 (92%) | 0.2 |
| WEB SLS | 4 (22%) | 14 (78%) | 0.5 | 3 (21%) | 11 (79%) | 0.2 |
| Immediate incomplete occlusion | 2 (5%) | 40 (95%) | 0.02 | 2 (6%) | 30 (94%) | 0.3 |
AcomA, anterior communicating artery; BA, basilar artery; D/N ratio=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 ratio=width to-height ratio. DL=double layer