Univariate predictors of hemorrhagic complications
| Variablea | No Hemorrhagic Complications (n = 735) | NAP (n = 48) | P Value |
|---|---|---|---|
| Age (yr) | 32.2 ± 13.7 | 33.9 ± 14.4 | .405 |
| Hemorrhagic presentation | 316 (43) | 18 (38) | .419 |
| Nidus diameter (cm) | 4.1 ± 3.8 | 3.9 ± 3.5 | .553 |
| Spetzler-Martin gradeb | III | III | .874 |
| AVM involving eloquent area | 443 (60) | 36 (75) | .164 |
| Deep venous drainage | 317 (43) | 21 (44) | .660 |
| Intranidal aneurysm presence | 107 (15) | 6 (13) | .513 |
| Venous stenosis | 40 (5) | 5 (10) | .227 |
| Venous ectasia | 372 (51) | 25 (3) | .596 |
| Premature venous occlusion | 3 (0.4) | 8 (17) | <.001 |
| Complete occlusion of AVM | 181 (25) | 18 (38) | .114 |
| Detachable microcatheter | 127 (17) | 7 (15) | .606 |
| Onyx volume (mL) | 2.1 ± 2.0 | 2.9 ± 1.9 | <.02 |
| Total embolic agent volume (mL)c | 2.5 ± 1.9 | 3.2 ± 1.6 | <.03 |
| Ratio of Onyx volume (mL)/nidus diameter (cm) | 0.6 ± 0.6 | 0.8 ± 0.6 | <.01 |
| Ratio of Vea (mL)/nidus diameter (cm)c | 0.7 ± 0.6 | 0.9 ± 0.6 | <.01 |
| No. of pedicles embolized in each procedureb | 1 | 1 | .629 |