Table 2.
Aneurysm’s characteristics
| Study population n=153 |
Group 1 (non IONM) n=52 |
Group 2 (IONM) n=101 |
p-value | ||
|---|---|---|---|---|---|
| Side | L | 63 (51.2%) | 20 (47.6%) | 43 (42.6%) | |
| R | 90 (48.78%) | 32 (52.4%) | 58 (57.4%) | 0.62 | |
| Topography | M1 | 15 (9.8%) | 6 (12.5%) | 9 (9.3%) | |
| Bifurcation | 125 (81.7%) | 41 (85.4%) | 84 (86.6%) | ||
| Distal | 5 (8.5%) | 1 (2.1%) | 4 (4.1%) | 0.92 | |
| Aneurysm sac size mm (median; range) | 5.4; 1–43 | 5.4; 2–43 | 5.1; 1–25 | 0.86 | |
| Aneurysm neck size mm (median; range) | 3.4; 1–11 | 3.4; 2–7.5 | 3; 1–25 | 0.72 | |
| Aspect ratio (median; range) | 1.6; 0.2–8.6 | 1.6; 0.7–8.6 | 1.5; 0.2–4.2 | 0.93 | |
| Blebs | 70 (45.7%) | 21 (40.4%) | 49 (48.5%) | 0.51 | |
| Perforators | 22 (14.4%) | 6 (11.5%) | 16 (15.8%) | 0.58 | |
IONM intraoperative neurophysiological monitoring, L left, R right