Table 2B.
Angioarchitecture (Children vs. Adults)
| Characteristic | All (n=833) | Child (0–18 yrs) (n=203) | Adult (≥19 yrs) (n=630) | p-value |
|---|---|---|---|---|
| AVM nidus size | 0.069 | |||
| <3 cm | 417 (55%) | 95 (53%) | 322 (55%) | |
| 3–6 cm | 305 (40%) | 68 (38%) | 237 (41%) | |
| >6 cm | 38 (5%) | 15 (8%) | 23 (4%) | |
|
| ||||
| AVM side | 0.839 | |||
| Right | 321 (44%) | 79 (46%) | 242 (44%) | |
| Left | 363 (50%) | 84 (49%) | 279 (51%) | |
| Middle | 39 (5%) | 10 (6%) | 29 (5%) | |
|
| ||||
| Central location | 0.075 | |||
| Yes | 282 (38%) | 78 (44%) | 201 (36%) | |
| No | 453 (62%) | 98 (56%) | 355 (64%) | |
|
| ||||
| Dural location | 1.000 | |||
| Yes | 3 (<1%) | 0 (0%) | 3 (1%) | |
| No | 723 (>99%) | 174 (100%) | 549 (99%) | |
|
| ||||
| Lobar location | 0.131 | |||
| Yes | 555 (76%) | 125 (71%) | 430 (77%) | |
| No | 180 (24%) | 51 (29%) | 129 (23%) | |
|
| ||||
| Posterior fossa location | 0.809 | |||
| Yes | 110 (15%) | 25 (14%) | 85 (15%) | |
| No | 616 (85%) | 151 (86%) | 465 (85%) | |
|
| ||||
| Eloquence | 0.212 | |||
| Yes | 452 (61%) | 112 (65%) | 340 (59%) | |
| No | 292 (39%) | 60 (35%) | 232 (41%) | |
|
| ||||
| AVM border | 0.218 | |||
| Compact | 573 (80%) | 126 (77%) | 447 (81%) | |
| Diffuse | 140 (20%) | 38 (23%) | 102 (19%) | |
|
| ||||
| Venous drainage | <0.001 | |||
| Superficial | 389 (51%) | 67 (37%) | 322 (55%) | |
| Superficial and deep | 238 (31%) | 61 (34%) | 177 (30%) | |
| Exclusively deep | 134 (18%) | 51 (28%) | 83 (14%) | |
|
| ||||
| Number of draining veins | 0.046 | |||
| 1 vein | 208 (39%) | 58 (47%) | 150 (36%) | |
| 2+ veins | 329 (61%) | 66 (53%) | 263 (64%) | |
|
| ||||
| Number of veins reaching sinus | 0.117 | |||
| 0–1 veins | 171 (34%) | 46 (40%) | 125 (32%) | |
| 2+ veins | 330 (66%) | 68 (60%) | 262 (68%) | |
|
| ||||
| Venous stenosis | 0.144 | |||
| 0–24 | 266 (47%) | 75 (56%) | 191 (44%) | |
| 25–49 | 93 (16%) | 22 (16%) | 71 (16%) | |
| 50–74 | 126 (22%) | 24 (18%) | 102 (23%) | |
| 75–99 | 71 (12%) | 12 (9%) | 59 (14%) | |
| 100 | 15 (3%) | 2 (1%) | 13 (3%) | |
|
| ||||
| Venous thrombosis | 0.607 | |||
| 0–24 | 504 (96%) | 121 (96%) | 383 (96%) | |
| 25–49 | 4 (1%) | 0 (0%) | 4 (1%) | |
| 50–74 | 4 (1%) | 2 (2%) | 2 (1%) | |
| 75–99 | 1 (<1%) | 0 (0%) | 1(<1%) | |
| 100 | 14 (3%) | 3 (2%) | 11 (3%) | |
|
| ||||
| Venous ectasia | <0.001 | |||
| Yes | 273 (48%) | 45 (35%) | 228 (52%) | |
| No | 292 (52%) | 85 (65%) | 208 (48%) | |
|
| ||||
| Venous reflux | 0.075 | |||
| Yes | 161 (29%) | 29 (23%) | 132 (31%) | |
| No | 387 (71%) | 98 (77%) | 289 (69%) | |
|
| ||||
| Moyamoya type changes | 0.208 | |||
| Yes | 8 (1%) | 0 (0%) | 8 (2%) | |
| No | 563 (99%) | 135 (100%) | 428 (98%) | |
|
| ||||
| Pial-to-pial collaterialization | 0.090 | |||
| Yes | 120 (21%) | 21 (16%) | 99 (23%) | |
| No | 448 (79%) | 112 (84%) | 336 (77%) | |
|
| ||||
| Aneurysm related to shunt-flow | <0.001 | |||
| Yes | 172 (25%) | 21 (13%) | 151 (29%) | |
| No | 515 (75%) | 139 (87%) | 376 (71%) | |
|
| ||||
| Aneurysm not related to shunt-flow | 0.384 | |||
| Yes | 16 (2%) | 2 (1%) | 14 (3%) | |
| No | 670 (98%) | 158 (99%) | 512 (97%) | |
|
| ||||
| Intranidal aneurysm | 0.537 | |||
| Yes | 107 (16%) | 28 (17%) | 79 (15%) | |
| No | 575 (84%) | 134 (83%) | 441 (85%) | |
Table entries are n (%) or mean ± sd. Note that all variables are missing varying amounts of data.
P-values are from Fisher’s exact test.