Aneurysm characteristics
| Aneurysm Characteristics | Anterior ICA ≥10 mm | Anterior ICA <10 mm | Posterior | Other Anterior | P Value | Total |
|---|---|---|---|---|---|---|
| Aneurysm size (mm) | <.0001 | |||||
| Mean ± SD (n) | 16.8 ± 6.3 (317) | 5.2 ± 2.2 (360) | 13.8 ± 8.4 (93) | 9.2 ± 8.0 (126) | 10.7 ± 7.7 (896) | |
| Median, range | 15.0, 10.0–42.0 | 5.0, 1.0–10.0 | 11.6, 1.5–45.0 | 6.7, 1.0–55.0 | 9.0, 1.0–55.0 | |
| Aneurysm type | <.0001 | |||||
| Small | 0.0% (0/317) | 100.0% (360/360) | 35.5% (33/93) | 63.5% (80/126) | 52.8% (473/896) | |
| Large | 85.8% (272/317) | 0.0% (0/360) | 49.5% (46/93) | 31.0% (39/126) | 39.8% (357/896) | |
| Giant | 14.2% (45/317) | 0.0% (0/360) | 15.1% (14/93) | 5.6% (7/126) | 7.4% (66/896) | |
| Aneurysm neck (mm) | <.0001 | |||||
| Mean ± SD (n) | 8.5 ± 5.0 (297) | 4.1 ± 2.2 (335) | 8.7 ± 7.5 (70) | 4.8 ± 5.1 (110) | 6.2 ± 4.9 (812) | |
| Median, range | 7.6, 0.9–50.0 | 3.9, 0.8–22.0 | 6.6, 1.7–53.0 | 3.9, 1.0–50.0 | 5.0, 0.8–53.0 | |
| Aneurysm shape | <.0001 | |||||
| Saccular | 77.3% (245/317) | 87.8% (316/360) | 35.8% (34/95) | 71.7% (91/127) | 76.0% (689/906) | |
| Fusiform | 15.5% (49/317) | 4.7% (17/360) | 29.5% (28/95) | 15.0% (19/127) | 12.8% (116/906) | |
| Dissecting | 3.2% (10/317) | 2.2% (8/360) | 28.4% (27/95) | 7.1% (9/127) | 6.0% (54/906) | |
| Other | 4.1% (13/317) | 5.3% (19/360) | 6.3% (6/95) | 6.3% (8/127) | 5.2% (47/906) | |
| Aneurysm location | <.0001 | |||||
| Internal carotid artery | 100.0% (317/317) | 100.0% (360/360) | 0.0% (0/95) | 0.0% (0/127) | 75.5% (684/906) | |
| Middle cerebral artery | 0.0% (0/317) | 0.0% (0/360) | 0.0% (0/95) | 33.9% (43/127) | 4.7% (43/906) | |
| Posterior cerebral artery | 0.0% (0/317) | 0.0% (0/360) | 15.8% (15/95) | 0.0% (0/127) | 1.7% (15/906) | |
| Basilar artery | 0.0% (0/317) | 0.0% (0/360) | 46.3% (44/95) | 0.0% (0/127) | 4.9% (44/906) | |
| Other | 0.0% (0/317) | 0.0% (0/360) | 37.9% (36/95) | 66.1% (84/127) | 13.2% (120/906) | |
| Presented with ruptured aneurysm | 3.8% (12/317) | 6.7% (24/360) | 7.4% (7/95) | 25.2% (32/127) | <.0001 | 8.4% (76/906) |
| Multiple PEDs utilized | 45.4% (144/317) | 27.4% (98/358) | 37.9% (36/95) | 22.8% (29/127) | <.0001 | 34.1% (308/904) |