Characteristics of patients with an irregularly or regularly shaped aneurysm
| Characteristic | Irregularly Shaped | Regularly Shaped | P |
|---|---|---|---|
| No. (%) | 153 (30.7) | 346 (69.3) | |
| Mean (SD) age, y | 52.3 (11.8) | 52.1 (11.6) | .86 |
| Female, no. (%) | 108 (70.6) | 243 (70.0) | .92 |
| Recently ruptured, no. (%) | 87 (56.9) | 179 (51.6) | .29 |
| Assist device used, no. (%) | 79 (52.3) | 144 (42.4) | .05 |
| Small D/N ratio, no. (%) | 43 (28.1) | 121 (34.9) | .15 |
| Aneurysm size, no. (%) | |||
| Small | 56 (36.6) | 72 (20.8) | .0003 |
| Medium | 81 (52.9) | 208 (59.9) | |
| Large | 16 (10.5) | 67 (19.3) | |
| Mean (SD) size, mm | 8.9 (3.7) | 7.5 (3.2) | <.0001 |
| WFNS score, no. (%) | |||
| 0 | 62 (40.5) | 156 (45.0) | .38 |
| I | 73 (47.7) | 161 (46.4) | |
| II | 16 (10.5) | 26 (7.5) | |
| III | 1 (0.7 | 4 (1.2) | |
| VI | 1 (0.7) | 0 (0.0) |
Note:—D/N indicates dome-to-neck ratio; WFNS, World Federation of Neurosurgical Societies.