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Table 4: Univariate predictors of hemorrhagic complications
Variable^{^a} 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 grade^{^b} 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 V_ea (mL)/nidus diameter (cm)^{^c} 0.7 ± 0.6 0.9 ± 0.6 <.01
No. of pedicles embolized in each procedure^{^b} 1 1 .629
↵a Mean ± SD (median) (interquartile range) or count (%).
↵b Median.
↵c Sum of Onyx and glue used in each procedure.