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Table 2: Univariate freedom from recurrent hemorrhage of SCAVMs^{^a}
Variables Total (n = 80) Recurrent Hemorrhage Unadjusted P Value
(+) (n = 35) (−) (n = 45)
Baseline characteristics 
    Median age (yr) (IQR) 20 (10–32) 18 (8–25) 21 (15–38) 
        Pediatric 30 (38) 16 (46) 14 (31) .87
    Male 31 (39) 12 (34) 19 (42) .73
    Endovascular embolization^{^b} 41 (51) 1 (2.9) 40 (89) <.0001
Radiologic characteristics 
    Subclassification .51
        SCAVM 63 (79) 31 (89) 32 (71) 
        SCAVF, single hole 7 (8.8) 1 (2.9) 6 (13) 
        SCAVF, multiple holes 10 (13) 4 (11) 6 (13) 
    SCAVM level .92
        Cranial-cervical 2 (2.5) 1 (2.9) 1 (2.2) 
        Cervical 33 (41) 16 (46) 17 (39) 
        Cervical-thoracic 1 (1.3) 0 1 (2.2) 
        Thoracic 31 (39) 13 (37) 18 (40) 
        Thoracic-lumbar 9 (11) 4 (11) 5 (11) 
        Lumbar 4 (5.0) 1 (2.9) 3 (6.7) 
    Associated aneurysm^{^b} 56 (70) 31 (89) 25 (56) .049
    Venous thrombosis^{^b} 7 (8.8) 1 (2.9) 6 (13) .19
    Venous stricture 2 (2.5) 0 2 (4.4) .21
    Venous ectasia 16 (20) 7 (20) 9 (20) .24
    Venous hypertension 16 (20) 7 (20) 9 (20) .66
Note:—SCAVF indicates spinal cord AVF; IQR, interquartile range 25th–75th percentile.
↵a Data are expressed as number of lesions (%), unless otherwise indicated.
↵b Variables related to the recurrent hemorrhage by log-rank test (P < .20).