Univariate and multivariate analysis of aneurysm factors associated with immediate post-operative adequate aneurysm occlusion
| Patients with adequate IA occlusion n=1096 | Patient with aneurysm remnant n=93 | Univariate analysis P | Multivariate analysis | ||
| OR (CI 95%) | P | ||||
| Rupture status | 0.19 | ||||
| Ruptured | 755 (92.9) | 58 (7.1) | |||
| Unruptured | 341 (90.7) | 35 (9.3) | |||
| Aneurysm size (maximum diameter) | |||||
| Mean±SD (mm) | 6.4±2.9 | 7.7±4.6 | 0.007 | ||
| <10 mm, n (%) | 957 (93.1) | 71 (6.9) | 0.003 | 1.8 (1.1 to 3.2) | 0.02 |
| ≥10 mm, n (%) | 139 (86.3) | 22 (13.7) | 1.0 | ||
| Neck size | |||||
| Mean±SD (mm) | 3.1±1.4 | 4.0±2.1 | <0.0001 | ||
| <4 mm, n (%) | 828 (94.3) | 50 (5.7) | <0.0001 | ||
| ≥4 mm, n (%) | 268 (86.2) | 43 (13.8) | |||
| Wide neck* | <0.0001 | ||||
| Yes | 619 (89.6) | 72 (10.4) | 1.0 | 0.0004 | |
| No | 477 (95.8) | 21 (4.2) | 2.5 (1.5 to 4.1) | ||
| Aneurysm location | 0.17 | ||||
| Acom/ACA, n (%) | 436 (93.8) | 29 (6.2) | |||
| MCA, n (%) | 222 (91.0) | 22 (9.0) | |||
| ICA intradural, n (%) | 341 (91.2) | 33 (8.8) | |||
| ICA extradural, n (%) | 11 (78.6) | 3 (21.4) | |||
| VB, n (%) | 86 (93.5) | 6 (6.5) | |||
| Aneurysm shape | 0.16 | ||||
| Regular, n (%) | 292 (90.4) | 31 (9.6) | |||
| Irregular, n (%) | 804 (92.8) | 62 (7.2) | |||
| Treatment† | 0.58 | ||||
| Coiling, n (%) | 592 (91.8) | 53 (8.2) | |||
| BAC, n (%) | 504 (92.7) | 40 (7.3) | |||
*Wide neck defined as neck ≥4 mm and/or dome-to-neck ratio <2.
†Factors included in the multivariate analysis: aneurysm size (<10 mm; ≥10 mm) and wide neck.
Acom/ACA, anterior communicating/anterior cerebral artery; BAC, balloon-assisted coiling; IA, intracranial aneurysm; ICA, internal carotid artery; MCA, middle cerebral artery; VB, vertebrobasilar.