Table 1. Distribution of demographic and related BAVM characteristics of patients.
| Characteristics | Total (n=85) | Grade I (n=17) | Grade II (n=15) | Grade III (n=34) | Grade IV (n=14) | Grade V (n=5) |
|---|---|---|---|---|---|---|
| Demographic | ||||||
| Male | 50 | 9 | 9 | 18 | 11 | 3 |
| Median age in years [range] | 33.5 [5–64] | 25.6 [13–49] | 35.9 [14–59] | 36.7 [10–63] | 32.6 [14–54] | 26.8 [5–66] |
| Preoperative embolization | 35 | 8 | 7 | 13 | 5 | 2 |
| BAVM | ||||||
| New hemorrhage | 22 | 9 | 3 | 4 | 6 | 0 |
| Eloquence | 47 | 0 | 5 | 24 | 13 | 5 |
| Size <3 cm | 26 | 17 | 6 | 3 | 0 | 0 |
| Size 3–6 cm | 50 | 0 | 9 | 30 | 11 | 0 |
| Size >6 cm | 9 | 0 | 0 | 1 | 3 | 5 |
| Diffuse nidus | 15 | 1 | 3 | 5 | 2 | 4 |
| Deep drainage | 30 | 0 | 2 | 11 | 12 | 5 |
| Associated aneurysm | 18 | 3 | 1 | 10 | 4 | 0 |
BAVM, brain arteriovenous malformation.