Aneurysm characteristics
| Aneurysm Characteristics | PED/Coils | PED Alone | P Valuea |
|---|---|---|---|
| No. of aneurysms | 109 | 797 | |
| No. of patients | 104 | 689 | |
| Aneurysm size (mm)b | <.0001 | ||
| Mean | 13.6 ± 7.8 | 10.3 ± 7.6 | |
| Median, range | 12; 1.6–45.0 | 8; 1.0–55.0 | |
| Aneurysm neck (mm) | .017 | ||
| Mean | 6.4 ± 3.0 | 6.2 ± 5.1 | |
| Median, range | 6; 0.8–16.0 | 5; 0.9–53.0 | |
| Aneurysm shape (No., %) | .3366 | ||
| Fusiform | 13 (11.9%) | 103 (12.9%) | |
| Saccular | 85 (78.0%) | 604 (75.8%) | |
| Dissecting | 3 (2.8%) | 51 (6.4%) | |
| Other | 8 (7.3%) | 39 (4.9%) | |
| Aneurysm location (No., %) | <.0001 | ||
| Internal carotid artery | 70 (64.2%) | 614 (77.0%) | |
| Middle cerebral artery | 8 (7.3%) | 35 (4.4%) | |
| Posterior cerebral artery | 0 (0%) | 15 (1.9%) | |
| Basilar artery | 16 (14.7%) | 28 (3.5%) | |
| Other | 15 (13.8%) | 105 (13.2%) | |
| Aneurysm ruptured at initial presentation (No., %) | 13 (11.9%) | 63 (7.9%) | .155 |
| Multiple PEDs usedc (No., %) | 34 (31.2%) | 274 (34.5%) | .499 |
↵a P values for aneurysm size and neck size were calculated with Wilcoxon rank sum tests. P values for categoric variables were calculated with χ2 tests.
↵b Of the 797 aneurysms treated with PEDs alone, size data were not available for 8 aneurysms. Of the 109 aneurysms treated with PED/coil, size data were not available for 2 aneurysms.
↵c Of the 797 aneurysms treated with PEDs alone, data regarding the number of PEDs used were not reported for 2 aneurysms.