Adjusted ORs of outcomes according to consecutive series of procedures
| Outcomes | Surgical experience | N | Events, n (%) | Adjusted OR (95% CI)* | P value |
| Major complications | Group 1 | 25 | 13 (52.00) | Ref | Ref |
| Group 2 | 188 | 65 (34.57) | 0.597 (0.251 to 1.422) | 0.244 | |
| Unfavourable outcomes | Group 1 | 25 | 11 (44.00) | Ref | Ref |
| Group 2 | 188 | 35 (18.62) | 0.333 (0.130 to 0.852) | 0.022 |
*Adjusted for age, sex, AVM size, location, deep venous drainage and associated aneurysms.
AVM, arteriovenous malformation; mRS, modified Rankin Scale.