Table 1.
Morphometric characteristics of all aneurysms and comparison of means of anterior and posterior circualtion aneurysms
| All aneurysms | Anterior circulation aneurysms | Posterior circulation aneurysms | Anterior vs. posterior | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | SD | N | Mean | SD | N | Mean | SD | p value | |
| Dome size (mm) | 254 | 12.0 | 6.9 | 179 | 11.13 | 7.5 | 75 | 10.51 | 3.7 | 0.292 |
| Aspect ratio | 254 | 2.1 | 1.2 | 179 | 1.91 | 0.8 | 75 | 2.75 | 1.8 | 0.020a |
| Inflow angle (degrees) | 254 | 111.2 | 31.1 | 179 | 121.7 | 22.1 | 75 | 109.93 | 34.8 | 0.255 |
| Neck size (mm) | 254 | 3.62 | 4.8 | 179 | 3.59 | 5.3 | 75 | 3.68 | 2 | 0.485 |
| Neck/parent artery | 254 | 1.2 | 0.8 | 179 | 0.91 | 0.8 | 75 | 1.19 | 0.2 | 0.920 |
| Parent artery size (mm) | 254 | 4.2 | 1.6 | 179 | 5.08 | 1.8 | 75 | 3.95 | 1.5 | <0.05a |
| Size ratio | 254 | 3.0 | 1.0 | 179 | 2.22 | 0.9 | 75 | 3.19 | 1.8 | 0.045a |
SD, standard deviation
aDifference is statistically significant