Patient and aneurysm baseline characteristics
| Patients | |
| Age (years), mean (range) | 55.8 (19–83) |
| Modified Fisher grade | |
| 1 | 6 (14) |
| 2 | 5 (11) |
| 3 | 7 (16) |
| 4 | 26 (59) |
| Treated for initial SAH, n (%) | 41 (93) |
| Aneurysm type | Fusiform | Dissecting | Saccular | Blister-like | Total |
| N (% of total) | 13 (30) | 11 (25) | 11 (25) | 9 (20) | 44 (100) |
| WFNS 4–5 at presentation, n (%) | 4 (31) | 6 (55) | 4 (36) | 0 (0) | 14 (32) |
| Posterior circulation, n (%) | 9 (69) | 6 (55) | 4 (36) | 1 (11) | 20 (45) |
| Maximum size*, mean (range) | 12.3 (4.5–26.0) | 6.6 (2.0–13.7) | 10.7 (2.0–31.0) | 3.1 (1.3–6.0) | NA |
| Neck size*, mean (range) | NA | NA | 3.9 (1.6–11.0) | 3.0 (1.7–6.0) | NA |
| Dome-to-neck ratio, mean (range) | NA | NA | 1.6 (0.6–4.1) | 0.7 (0.3–1.0) | NA |
| Number additionally coiled (%) | 3 (23) | 3 (27) | 3 (27) | 0 (0) | 9 (20) |
| Treated ultra-early (at day 0) | 5 (38) | 1 (11) | 4 (36) | 3 (33) | 13 (30) |
*All given sizes are in mm.
mRS, modified Rankin Scale; NA, not applicable; SAH, subarachnoid hemorrhage; WFNS, World Federation of Neurosurgical Societies.