Baseline study design and aneurysm data
| Clipping | Coiling | |||||
|---|---|---|---|---|---|---|
| Studies | ||||||
| Retrospective single center | 21 | 10 | ||||
| Prospective single center | 1 | 5 | ||||
| Multicenter or community-based | 8 | 4 | ||||
| Total | 30 | 19 | ||||
| Patient baseline information | ||||||
| Mean age (y) | 57.0 | 53.1 | ||||
| Aneurysm size | UIA No.* | % | UIA No.‡ | % | UIA No. | % |
| Small | 1399 | 35.7 | 297 | 36.1 | 1696 | 35.8 |
| Medium | 1394 | 35.6 | 236 | 28.7 | 1630 | 34.4 |
| Large | 898 | 22.9 | 219 | 26.6 | 1117 | 23.6 |
| Giant | 224 | 5.7 | 70 | 8.5 | 294 | 6.2 |
| Total | 3915 | 822 | 4737 | |||
| Aneurysm site | UIA No.† | % | UIA No.§ | % | UIA No. | % |
| Cavernous carotid artery | 102 | 2.4 | 99 | 10.3 | 201 | 3.8 |
| ICA and Ophthalmic | 1542 | 36.1 | 269 | 27.9 | 1811 | 34.6 |
| ACom, ACA, and pericollosal | 676 | 15.8 | 173 | 18.0 | 849 | 16.2 |
| MCA | 1340 | 31.3 | 117 | 12.1 | 1457 | 27.8 |
| PCom | 183 | 4.3 | 71 | 7.4 | 245 | 4.9 |
| Vertebrobasilar system | 239 | 5.6 | 81 | 8.4 | 320 | 6.1 |
| Basilar tip | 194 | 4.5 | 153 | 15.9 | 347 | 6.6 |
| Total | 4276 | 963 | 5239 |
Note.—ICA indicates internal carotid artery; ACom, anterior communicating artery; ACA, anterior cerebral artery; PCom, posteror communicating artery. UIA nos. were based on the following references:
* , 11, 14, 18–24;
† , 3, 11, 14, 18–21, 23, 24, 25–27;
‡ , 3, 5, 7, 28–31;
§ , 3, 7, 28, 32.