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Table 2 Baseline Characteristics of BAVM by Unfavorable or No unfavorable hemorrhagea

From: Pediatric brain arteriovenous malformation unfavorable hemorrhage risk: extrapolation to a morphologic model

Characteristic No unfavorable hemorrhage (n = 113) Unfavorable hemorrhage (n = 49) Total (n = 162) P value
Demographic
 Gender     .36
  Female 42 (37.2) 22 (44.9) 64 (39.5)  
  Male 71 (62.8) 27 (55.1) 98 (60.5)  
Age at diagnosis (ys) 12.66 ± 4.00 11.59 ± 3.43 12.33 ± 3.85 .14
Clinical
 mRS at presentation     < .001c
  0 11 (9.7) 0 (0) 11 (6.8)  
  1 53 (46.9) 0 (0) 53 (32.7)  
  2 27 (23.9) 1 (2.1) 28 (17.3)  
  3 22 (19.5) 3 (6.1) 25 (15.4)  
  4 0 (0) 20 (40.8) 20 (12.4)  
  5 0 (0) 25 (51.0) 25 (15.4)  
Radiological
 Supratentorial location 107 (94.7) 45 (91.8) 152 (93.8) .74b
 Deep location 36 (31.9) 23 (46.9) 59 (36.4) .08
 Eloquence 55 (48.8) 22 (44.9) 77 (47.5) .66
 Periventricular location 55 (48.7) 37 (75.5) 92 (56.8) .002
 Temporal lobe location 44 (38.9) 10 (20.4) 54 (33.3) .02
 Maximal nidus size (mm) 11.49 ± 4.21 39.13 ± 19.96 39.49 ± 18.73 .88
 Exclusively Deep Venous drainage 10 (8.8) 7 (14.3) 17 (10.5) .30
 Long pial draining vein 49 (43.4) 30 (61.0) 79 (48.8) .04
 Associated aneurysm 11 (9.7) 6 (12.2) 17 (10.5) .63
  1. aTable entries are No. (%) or mean ± SD. P value in boldface indicates statistical significance
  2. bP values are from the χ2 test (correction for continuity)
  3. cP values are from the Mann-Whitney U test