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Table 4 Statistical analysis among classifications

From: Brain arteriovenous malformations of the middle cerebral artery region: image characteristics and endovascular treatment based on a new classification system

 

Type I

Type II

Type IIIa

Type IIIb

P value

Age (years)

33.5 ± 9.4

34.3 ± 18.0

33.1 ± 15.8

34.4 ± 14.1

0.9741

Female/total

12/15

8/16

31/54

24/50

0.1674

IVH involvement/hemorrhage

8/14

1/11

3/43

12/27

 < 0.0001

Size (cm)

2.3 ± 1.4

3.9 ± 1.4

3.1 ± 1.6

4.7 ± 1.5

 < 0.0001

Deep vein involvement/total

11/15

1/16

0/54

5/50

 < 0.0001

Normal draining vein/total

5/15

7/16

27/54

5/50

0.0002

EVT degree > (2/3)/total

3/15

4/16

32/54

10/50

0.0001

  1. BAVM brain arteriovenous malformation, EVT endovascular treatment, IVH intraventricular hemorrhage
  2. For age and BAVM size, ordinary one-way ANOVA was used. For other data, the chi-square test was used