Factors related to intraprocedural events that were considered in the univariate analysis
| Factors | IPR(+) (n=221) | Ischemia(+) (n=226) | Rebleeding(+) (n=63) | All (n=5358) |
| Age | 64.7±15.6 | 65.1±14.1 | 69.8±15.0 | 64.6±14.9 |
| Sex | ||||
| Female | 174 (4.6%) | 153 (4.0%) | 48 (1.3%) | 3794 |
| Male | 46 (3.0%) | 72 (4.6%) | 15 (1.0%) | 1558 |
| mRS before onset | ||||
| 0 | 171 (4.1%) | 171 (4.1%) | 46 (1.1%) | 4221 |
| 1 | 18 (4.8%) | 17 (4.5%) | 7 (1.9%) | 378 |
| 2 | 9 (4.1%) | 13 (5.9%) | 2 (0.9%) | 219 |
| 3 | 6 (4.3%) | 8 (5.7%) | 1 (0.7%) | 141 |
| 4 | 9 (6.31%) | 4 (2.8%) | 5 (3.5%) | 144 |
| 5 | 3 (2.8%) | 5 (4.7%) | 0 (0.0%) | 106 |
| WFNS classification | ||||
| 1 | 45 (3.8%) | 59 (5.0%) | 4 (0.3%) | 1179 |
| 2 | 64 (4.3%) | 82 (5.5%) | 16 (1.1%) | 1490 |
| 3 | 33 (4.4%) | 29 (3.8%) | 12 (1.6%) | 757 |
| 4 | 40 (4.2%) | 30 (3.2%) | 18 (1.9%) | 948 |
| 5 | 35 (4.1%) | 20 (2.4%) | 13 (1.5%) | 850 |
| Site | ||||
| AcomA, ACA | 89 (5.3%) | 61 (3.6%) | 23 (1.4%) | 1674 |
| PcomA | 48 (3.6%) | 51 (3.8%) | 7 (0.5%) | 1352 |
| Distal ICA | 12 (3.9%) | 19 (6.2%) | 3 (1.0%) | 306 |
| Proximal ICA | 8 (2.4%) | 16 (4.8%) | 6 (1.8%) | 334 |
| MCA | 13 (3.8%) | 18 (5.3%) | 5 (1.5%) | 338 |
| BA | 28 (3.5%) | 33 (4.1%) | 15 (1.9%) | 796 |
| VA, PCA | 18 (4.2%) | 22 (5.2%) | 2 (0.5%) | 427 |
| Size (mm) | ||||
| <3 | 33 (7.7%) | 15 (3.5%) | 8 (1.2%) | 429 |
| 3–5 | 81 (4.6%) | 55 (3.1%) | 12 (0.7%) | 1747 |
| 5–7 | 53 (3.5%) | 50 (3.3%) | 20 (1.3%) | 1502 |
| 7–10 | 35 (3.6%) | 50 (5.1%) | 10 (1.0%) | 972 |
| 10–25 | 17 (2.6%) | 52 (7.9%) | 12 (1.8%) | 655 |
| ≥20 | 0 (0.0%) | 2 (1.8%) | 0 (0.0%) | 11 |
| Shape | ||||
| Small size/small neck | 109 (4.4%) | 69 (2.8%) | 14 (0.6%) | 2452 |
| Small size/wide neck | 92 (4.4%) | 95 (4.6%) | 35 (1.7%) | 2071 |
| Large | 16 (2.6%) | 47 (7.5%) | 11 (1.8%) | 624 |
| Giant | 0 (0.0%) | 2 (1.7%) | 0 (0.0%) | 12 |
| Non-saccular | 3 (2.7%) | 11 (10.0%) | 2 (1.8%) | 110 |
| Surgery | ||||
| Scheduled | 8 (1.7%) | 25 (5.3%) | 3 (0.6%) | 476 |
| Emergent | 212 (4.3%) | 201 (4.1%) | 60 (1.2%) | 4877 |
| Anesthesia | ||||
| General | 193 (4.0%) | 205 (4.2%) | 53 (1.1%) | 4861 |
| Local | 28 (5.8%) | 21 (4.3%) | 9 (1.9%) | 486 |
| Day of treatment | ||||
| Within 24 hours | 170 (4.6%) | 147 (4.0%) | 48 (1.3%) | 3716 |
| Within 72 hours | 30 (3.9%) | 34 (4.4%) | 9 (1.2%) | 767 |
| Within 7 days | 7 (2.4%) | 18 (6.1%) | 3 (1.0%) | 297 |
| Within 14 days | 4 (2.7%) | 10 (6.8%) | 2 (1.4%) | 148 |
| Within 30 days | 6 (4.3%) | 3 (2.1%) | 1 (0.7%) | 141 |
| After 30 days | 3 (1.3%) | 13 (5.8%) | 0 (0.0%) | 223 |
| Angiography system used | ||||
| Single plane | 45 (3.7%) | 56 (4.6%) | 16 (1.3%) | 1210 |
| Bi-plane | 176 (4.3%) | 169 (4.1%) | 47 (1.2%) | 4084 |
| 3D rotational angiography | ||||
| Used | 201 (4.1%) | 214 (4.4%) | 59 (1.2%) | 4871 |
| Not used | 20 (4.8%) | 11 (2.6%) | 4 (1.0%) | 417 |
| Treatment strategy | ||||
| Simple | 107 (3.7%) | 96 (3.3%) | 33 (1.1%) | 2911 |
| Double catheter | 12 (3.5%) | 18 (5.2%) | 3 (0.9%) | 343 |
| Balloon-assisted | 92 (5.2%) | 77 (4.4%) | 22 (1.2%) | 1761 |
| Stent-assisted | 9 (3.3%) | 33 (12.0%) | 5 (1.8%) | 274 |
| Coil | ||||
| Bare platinum only | 215 (4.2%) | 211 (4.1%) | 61 (1.2%) | 5099 |
| Hydrocoil(+) | 6 (3.2%) | 13 (7.0%) | 2 (1.1%) | 187 |
| Result of occlusion | ||||
| CO | 112 (4.1%) | 86 (3.2%) | 16 (0.6%) | 2723 |
| NR | 79 (4.1%) | 98 (5.1%) | 30 (1.6%) | 1911 |
| BF | 26 (4.0%) | 40 (6.1%) | 17 (2.6%) | 652 |
| Heparin administration | ||||
| After sheath | 154 (3.9%) | 158 (4.0%) | 49 (1.2%) | 3932 |
| After guiding catheter | 12 (4.6%) | 14 (5.4%) | 5 (1.9%) | 261 |
| After first coil | 29 (4.2%) | 37 (5.4%) | 7 (1.0%) | 688 |
| None | 16 (5.6%) | 8 (2.8%) | 1 (0.3%) | 288 |
| Preop antiplatelet drugs | ||||
| Yes | 24 (3.1%) | 48 (6.2%) | 10 (1.3%) | 770 |
| No | 190 (4.3%) | 171 (3.9%) | 52 (1.2%) | 4376 |
*Statistically significant.
ACA, anterior cerebral artery; AcomA, anterior communicating artery; AT, attempt; BA, basilar artery; BF, body filling; CO, complete occlusion; ICA, internal carotid artery;IPR, intraprocedural rupture; MCA, middle cerebral artery; mRS, modified Rankin Scale; NR, neck remnant; PAO, parent artery occlusion; PCA, posterior cerebral artery; PcomA, posterior communicating artery; Preop, preoperative; VA, vertebral artery; WFNS, World Federation of Neurosurgical Societies.