Table 2.
AVM characteristics
| Variables: Median [IQR]; n (%) |
Total (N = 88) |
Surgery only (N = 54) |
Preoperative embolisation (N = 34) |
P-value |
|---|---|---|---|---|
| AVM location | 0.4 | |||
| Frontal | 33 (38%) | 21 (39%) | 12 (35%) | |
| Cerebellar | 19 (22%) | 11(20%) | 8 (24%) | |
| Parietal | 16 (18%) | 10 (19%) | 6 (18%) | |
| Temporal | 13 (15%) | 10 (19%) | 3 (8.8%) | |
| Occipital | 6 (7%) | 2 (4%) | 4 (12%) | |
| Callosal | 1 (1%) | 0 (0%) | 1 (3%) | |
| Nidus maximum diameter (cm) | 2.0 [1.3 – 3.2] | 1.7 [1.2 – 2.1] | 3.0 [2.0 – 4.0] | < 0.001 |
| Deep venous drainage | 37 (42%) | 16 (30%) | 21 (62%) | 0.003 |
| Eloquent location | 34 (39%) | 18 (33%) | 16 (47%) | 0.2 |
| Haemorrhage | 67 (76%) | 43 (80%) | 24 (71%) | 0.3 |
| Compactness | 58 (66%) | 35 (65%) | 23 (68%) | 0.8 |
| Spetzler-Martin Grade | 0.002 | |||
| 1 | 41 (47%) | 32 (59%) | 9 (26%) | |
| 2 | 25 (28%) | 15 (28%) | 10 (29%) | |
| 3 | 22 (25%) | 7 (13%) | 15 (44%) | |
| 4 | 0 (0%) | 0 (0%) | 0 (0%) | |
| 5 | 0 (0%) | 0 (0%) | 0 (0%) | |
| Spetzler-Martin Extended Grade | 0.043 | |||
| 1 | 0 (0%) | 0 (0%) | 0 (0%) | |
| 2 | 10 (11%) | 9 (17%) | 1 (3%) | |
| 3 | 19 (22%) | 13 (24%) | 6 (18%) | |
| 4 | 30 (34%) | 17 (31%) | 13 (38%) | |
| 5 | 20 (23%) | 13 (24%) | 7 (21%) | |
| 6 | 9 (10%) | 2 (4%) | 7 (21%) |