Summary of procedure outcomes
| Characteristic | Overall (n=112) | 30 day cohort (n=66) | 12 month cohort (n=46) |
| Treatment after embolization (n (%)) | |||
| None | 45 (40.2) | 24 (36.4) | 21 (45.7) |
| Radiosurgery | 5 (4.5) | 1 (1.5) | 4 (8.7) |
| Surgical resection | 62 (55.4) | 41 (62.1) | 21 (45.7) |
| Number of pedicles embolized (mean±SD) | 1.9±2.0 | 1.8±1.7 | 2.1±2.4 |
| AVM obliteration percentage (n=111) (n (%)) | |||
| >80–100% | 13 (11.7) | 10 (15.4) | 3 (6.5) |
| >60–80% | 8 (7.2) | 3 (4.6) | 5 (10.9) |
| >40–60% | 9 (8.1) | 2 (3.1) | 7 (15.2) |
| >20–40% | 13 (11.7) | 7 (10.8) | 6 (13.0) |
| >0–20% | 68 (61.3) | 43 (66.2) | 25 (54.3) |
| AVM cured (n (%)) | 64 (57.1) | 37 (56.1) | 27 (58.7) |
| Onyx deployed (n (%)) | 101 (90.2) | 57 (86.4) | 44 (95.7) |
| Tip detached | 67 (59.8) | 23 (34.8) | 44 (95.7) |
| Unintentional | 1 (1.5) | 0 (0.0) | 1 (2.3) |
| No Onyx injected (n (%)) | 11 (9.8) | 9 (13.6) | 2 (4.3) |
| Tip detached | 2 (1.8) | 0 (0.0) | 2 (4.3) |
| Unintentional | 1 (50.0) | 0 (0.0) | 1 (50.0) |
| Further treatment planned (n (%)) | |||
| None | 69 (61.6) | 37 (56.1) | 32 (69.6) |
| Surgery | 21 (18.8) | 14 (21.2) | 7 (15.2) |
| Radiosurgery | 9 (8.0) | 5 (7.6) | 4 (8.7) |
| Radiosurgery and surgery | 1 (0.9) | 0 (0.0) | 1 (2.2) |
| Further embolization | 8 (7.1) | 6 (9.1) | 2 (4.3) |
| Unknown | 4 (3.6) | 4 (6.1) | 0 (0.0) |
AVM, arteriovenous malformation.