Table 2A.
Angioarchitecture (All Ages)
| Characteristic | No. (%) | Median Dx Age (yrs) | 95% CI | p-value |
|---|---|---|---|---|
| AVM nidus size | 0.009 | |||
| <3 cm | 417 (55%) | 37.1 | (34.1, 40.2) | |
| 3–6 cm | 305 (40%) | 30.7 | (27.9, 34.5) | |
| >6 cm | 38 (5%) | 26.8 | (16.9, 33.9) | |
|
| ||||
| AVM side | 0.087 | |||
| Right | 321 (44%) | 32.8 | (29.8, 35.9) | |
| Left | 363 (50%) | 34.1 | (32.1, 37.1) | |
| Middle | 39 (5%) | 37.2 | (27.6, 53.8) | |
|
| ||||
| Central location | 0.617 | |||
| Yes | 282 (38%) | 29.5 | (27.4, 33.6) | |
| No | 453 (62%) | 36.6 | (33.8, 38.4) | |
|
| ||||
| Dural location | 0.518 | |||
| Yes | 3 (<1%) | 25.9 | n/a | |
| No | 723 (>99%) | 34.1 | (32.2, 36.6) | |
|
| ||||
| Lobar location | 0.050 | |||
| Yes | 555 (76%) | 34.5 | (32.7. 37.0) | |
| No | 180 (24%) | 30.1 | (26.8, 39.8) | |
|
| ||||
| Posterior fossa location | <0.001 | |||
| Yes | 110 (15%) | 40.9 | (28.6, 47.8) | |
| No | 616 (85%) | 33.6 | (31.4, 35.7) | |
|
| ||||
| Eloquence | <0.001 | |||
| Yes | 452 (61%) | 31.5 | (29.0, 34.1) | |
| No | 292 (39%) | 37.4 | (34.3, 42.3) | |
|
| ||||
| AVM border | 0.707 | |||
| Compact | 573 (80%) | 35.1 | (33.2, 37.7) | |
| Diffuse | 140 (20%) | 31.2 | (27.4, 37.2) | |
|
| ||||
| Venous drainage | 0.040 | |||
| Superficial | 389 (51%) | 37.8 | (34.9, 40.6) | |
| Superficial and deep | 238 (31%) | 31.5 | (28.1, 35.1) | |
| Exclusively deep | 134 (18%) | 26.2 | (21.9, 32.2) | |
|
| ||||
| Number of draining veins | 0.572 | |||
| 1 vein | 208 (39%) | 33.2 | (28.4, 36.9) | |
| 2+ veins | 329 (61%) | 34.9 | (32.2, 37.5) | |
|
| ||||
| Number of veins reaching sinus | 0.678 | |||
| 0–1 veins | 171 (34%) | 32.3 | (28.3, 37.0) | |
| 2+ veins | 330 (66%) | 34.1 | (31.4, 37.0) | |
|
| ||||
| Venous stenosis (%) | 0.761 | |||
| 0–24 | 266 (47%) | 32.2 | (28.3, 36.1) | |
| 25–49 | 93 (16%) | 38.1 | (32.2, 42.4) | |
| 50–74 | 126 (22%) | 34.4 | (31.1, 40.0) | |
| 75–99 | 71 (12%) | 33.2 | (28.4, 39.0) | |
| 100 | 15 (3%) | 41.6 | (27.4, 50.3) | |
|
| ||||
| Venous thrombosis (%) | 0.551 | |||
| 0–24 | 504 (96%) | 34.0 | (32.1, 36.6) | |
| 25–49 | 4 (1%) | 21.1 | n/a | |
| 50–74 | 4 (1%) | 18.0 | n/a | |
| 75–99 | 1 (<1%) | n/a | n/a | |
| 100 | 14 (3%) | 34.1 | (12.2, 50.3) | |
|
| ||||
| Venous ectasia | 0.040 | |||
| Yes | 273 (48%) | 39.4 | (35.3, 42.8) | |
| No | 292 (52%) | 31.1 | (28.1, 33.9) | |
|
| ||||
| Venous reflux | 0.159 | |||
| Yes | 161 (29%) | 38.1 | (32.9, 43.4) | |
| No | 387 (71%) | 33.4 | (30.0, 35.8) | |
|
| ||||
| Moyamoya type changes | 0.659 | |||
| Yes | 8 (1%) | 27.4 | (21.4, 49.3) | |
| No | 563 (99%) | 33.9 | (31.5, 36.5) | |
|
| ||||
| Pial-to-pial collaterialization | 0.425 | |||
| Yes | 120 (21%) | 36.1 | (29.5, 39.8) | |
| No | 448 (79%) | 33.8 | (31.3, 36.6) | |
|
| ||||
| Aneurysm related to shunt-flow | <0.001 | |||
| Yes | 172 (25%) | 44.1 | (28.9, 33.9) | |
| No | 515 (75%) | 31.6 | (40.0, 47.8) | |
|
| ||||
| Aneurysm not related to shunt-flow | 0.069 | |||
| Yes | 16 (2%) | 47.1 | (32.1, 36.5) | |
| No | 670 (98%) | 33.9 | (34.5, 53.8) | |
|
| ||||
| Intranidal aneurysm | 0.143 | |||
| Yes | 107 (16%) | 31.9 | (26.6, 39.4) | |
| No | 575 (84%) | 34.6 | (32.8, 37.0) | |
Note that all variables are missing varying amounts of data.
P-values are from log-rank test of survivor functions.