Table 1

Basic characteristic of patients and bAVMs*, comparing ruptured and unruptured bAVM groups

Total
65
Unruptured bAVMs
22
Ruptured bAVMs
43
P-value
Age*40.5 ± 30.241.45 ± 13.740.0 ± 14.90.709
Male36 (55.4%)15 (68.2%)21 (58.3%)0.111
Preoperative mRS (good)60 (92.3%)22 (100.0%)38 (88.4%)0.117
SM grade III subtypes0.132
A (S1V1E1)28 (43.1%)7 (31.8%)21 (48.8%)
B (S2V1E0)13 (20.0%)3 (13.6%)10 (23.3%)
C (S2V0E1)23 (35.4%)12 (54.5%)11 (25.6%)
D (S3V0E0)1 (1.5%)0 (0.0%)1 (2.3%)
Localization0.608
Cortical-subcortical51 (78.5%)19 (86.4%)32 (74.4%)
Cortical-deep2 (3.1%)0 (0.0%)2 (4.7%)
Deep9 (13.8%)2 (9.1%)7 (16.3%)
Infratentorial3 (4.6%)1 (4.5%)2 (4.7%)
Eloquent51 (78.5%)19 (86.4%)11 (74.4%)0.218
Sensorimotor22 (33.8%)8 (36.4%)14 (32.6%)0.211
Visual11 (16.9%)6 (27.3%)5 (11.6%)
Language8 (12.3%)4 (18.2%)4 (9.3%)
Thalamus, basal ganglia, hypothalamus internal capsule7 (10.8%)0 (0.0%)7 (16.3%)
Cerebellar peduncle and nuclei1 (1.5%)0 (0.0%)1 (2.3%)
Brainstem2 (3.1%)1 (4.5%)1 (2.3%)
Nidus diameter (mm)30.2 ± 13.033.1 ± 8.928.7 ± 14.50.140
Arterial aneurysm19 (29.2%)6 (27.3%)13 (30.2%)0.804
Nidal aneurysm18 (27.7%)5 (22.7%)13 (30.2%)0.307†
Deep vein drainage41 (63.1%)10 (45.5%)31 (72.1%)0.037
Single venous drainage15 (23.1%)5 (22.7%)10 (23.3%)0.610†
Drained venous ectasia28 (43.1%)11 (50.0%)17 (39.5%)0.420
Total number of sessions2 (1–8)2 (1–5)1 (1–8)0.021‡
Follow-up (months)6 (6–72)6 (6–10)6 (6–72)0.243
Complete exclusion57 (86.4%)18 (81.8%)39 (88.6%)0.343
Pressure cooker approach3 (4.6%)0 (0.0%)3 (7.0%)0.283†
Venous approach2 (3.1%)1 (4.5%)1 (2.3%)0.566†
  • *mean±SD (SD).

  • †Fisher’s exact test.

  • ‡Mann–Whitney U test.

  • bAVMs, brain arteriovenous malformations; mRS, modified Rankin Scale; SM, Spetzler–Martin.