Patient and aneurysm characteristics
| Patient characteristics | All patients (n=1140) | Patients with at least one ruptured aneurysm (n=794) | Patients without ruptured aneurysm (n=346) |
| Sex | |||
| Female, n (%) | 757 (66.4%) | 520 (65.5%) | 237 (68.5%) |
| Male, n (%) | 383 (33.6%) | 274 (34.5%) | 109 (31.5%) |
| Age (years), mean±SD | 53.8±12.8 | 54.0±13.1 | 53.3±12.1 |
| Elevated blood pressure* | |||
| Yes, n (%) | 112 (10.2%) | 88 (11.6%) | 24 (7.0%) |
| No, n (%) | 990 (89.8%) | 673 (88.4%) | 317 (93.0%) |
| Current smoking† | |||
| Yes, n (%) | 511 (45.7%) | 366 (47.2%) | 145 (42.3%) |
| No, n (%) | 607 (54.3%) | 409 (52.8%) | 198 (57.7%) |
| Regular alcohol consumption‡ | |||
| Yes, n (%) | 235 (21.0%) | 164 (21.2%) | 71 (20.6%) |
| No, n (%) | 882 (79.0%) | 609 (78.8%) | 273 (79.4%) |
| Diabetes mellitus§ | |||
| Yes, n (%) | 57 (5.0%) | 32 (4.1%) | 25 (7.3%) |
| No, n (%) | 1074 (95.0%) | 756 (95.9%) | 318 (92.7%) |
| Polycystic kidney disease¶ | |||
| Yes, n (%) | 16 (1.4%) | 6 (0.8%) | 10 (2.9%) |
| No, n (%) | 1116 (98.6%) | 782 (99.2%) | 334 (97.1%) |
| Family history** | |||
| Yes, n (%) | 79 (7.1%) | 37 (4.8%) | 42 (12.3%) |
| No, n (%) | 1033 (92.9%) | 733 (95.2%) | 300 (87.7%) |
| Aneurysm characteristics | All aneurysms (n=1195) | Ruptured aneurysms (n=817) | Unruptured aneurysms (n=378) |
| Aneurysm size (maximum diameter) | |||
| Mean±SD (mm) | 6.5±3.1 | 6.3±3.0 | 6.9±3.2 |
| <7 mm, n (%) | 728 (60.9%) | 520 (63.6%) | 208 (55.0%) |
| ≥7 mm, n (%) | 467 (38.1%) | 297 (36.4%) | 170 (45.0%) |
| Neck size (mm), mean±SD | 3.2±1.5 | 3.0±1.3 | 3.6±1.6 |
| Dome to neck ratio | 2.1±0.9 | 2.2±0.9 | 2.0±0.8 |
| Wide neck†† | |||
| Yes, n (%) | 694 (58.1%) | 440 (53.9%) | 254 (67.2%) |
| No, n (%) | 501 (41.9%) | 377 (46.1%) | 124 (32.8%) |
| Aneurysm location | |||
| ACA/Acom, n (%) | 466 (39.0%) | 366 (44.8%) | 100 (26.5%) |
| MCA, n (%) | 247 (20.7%) | 165 (20.2%) | 82 (21.7%) |
| ICA intradural, n (%) | 376 (31.5%) | 230 (28.1%) | 146 (38.6%) |
| ICA extradural, n (%) | 14 (1.2%) | 1 (0.1%) | 13 (3.4%) |
| VB, n (%) | 92 (7.7%) | 55 (6.7%) | 37 (9.8%) |
| Aneurysm shape | |||
| Regular, n (%) | 325 (27.2%) | 164 (20.1%) | 161 (42.6%) |
| Irregular, n (%) | 870 (72.8%) | 653 (79.9%) | 217 (57.4%) |
| Treatment | |||
| Coiling, n (%) | 648 (54.2%) | 461 (56.4%) | 187 (49.5%) |
| BAC, n (%) | 547 (45.8%) | 356 (43.6%) | 191 (50.5%) |
| Occlusion‡‡ | |||
| Complete, n (%) | 687 (57.8%) | 465 (57.2%) | 222 (59.0%) |
| Residual neck, n (%) | 409 (34.4%) | 290 (35.7%) | 119 (31.7%) |
| Residual aneurysm, n (%) | 93 (7.8%) | 58 (7.1%) | 35 (9.3%) |
*38 missing data.
†22 missing data.
‡23 missing data.
§9 missing data.
¶8 missing data.
**28 missing data.
††Wide neck defined as neck size ≥4 mm and/or dome to neck ratio <2.
‡‡6 missing data.
ACA/Acom, anterior communicating/anterior cerebral artery ; BAC, balloon-assisted coiling; ICA, internal carotid artery; MCA, middle cerebral artery; VB, vertebrobasilar.