Aneurysm and procedure factors associated with aneurysm recanalization at mid-term follow-up
| Aneurysm and procedure characteristics | Recanalization (279/945) | Univariate analysis (p value) | Adjusted multivariate analysis* | ||
| OR (95%) | P value | ||||
| Aneurysm status | Ruptured | 196/614 (31.9%) | 0.03 | 1.7 (1.2 to 2.4) | 0.001 |
| Unruptured | 83/331 (25.1%) | 1 | |||
| Aneurysm size† | <10 mm | 216/816 (26.5%) | <0.0001 | 1 | <0.0001 |
| ≥10 mm | 63/129 (48.8%) | 3.3 (2.1 to 5.0) | |||
| Wide neck‡ | Yes | 179/557 (32.1%) | 0.03 | 1.5 (1.1 to 2.0) | 0.02 |
| No | 100/388 (25.8%) | 1 | |||
| Aneurysm location | MCA | 68/198 (34.3%) | 0.09 | 1.5 (1.0 to 2.1) | 0.04 |
| Other localization | 211/747 (28.3%) | 1 | |||
| Aneurysm shape | Regular | 65/269 (24.2%) | 0.02 | ||
| Irregular | 214/676 (31.7%) | NS | |||
| Treatment | Coiling | 149/516 (28.9%) | 0.63 | ||
| BAC | 130/429 (30.3%) | ||||
| Postoperative aneurysm occlusion | Complete occlusion | 179/547 (32.7%) | 0.01 | 2.0 (1.4 to 2.7) | <0.0001 |
| Neck or aneurysm remnant | 100/398 (25.1%) | ||||
*Factors included in the multivariate analysis: aneurysm status (ruptured/unruptured), aneurysm size (<10 mm/≥10 mm), wide neck defined as neck size ≥4 mm and/or dome to neck ratio <2, aneurysm location (MCA/other locations), and aneurysm shape (regular/irregular), adjusted on centers.
†Maximum diameter.
‡Wide neck defined as neck size ≥4 mm and/or dome to neck ratio <2.
BAC, balloon-assisted coiling; MCA, middle cerebral artery.