Table 1.
The univariate analysis of morphological features of small middle cerebral artery (MCA) aneurysms in the training cohort.
| Variable | Sample | Unruptured (n = 153) | Ruptured (n = 164) | P- value |
|---|---|---|---|---|
| Multi aneurysms (%) | 110 | 76 (49.67%) | 34 (20.73%) | <0.001 |
| Irregular (%) | 82 | 21 (13.73%) | 61 (37.20%) | <0.001 |
| Daughter dome (%) | 40 | 6 (3.92%) | 34 (20.73%) | <0.001 |
| Aneurysm location (%) | 0.185 | |||
| M1 | 125 | 65 (42.48%) | 60 (36.59%) | |
| Mbif | 180 | 80 (52.29%) | 100 (60.98%) | |
| Mdist | 12 | 8 (5.23%) | 4 (2.44%) | |
| Projection in axial (%) | 0.306 | |||
| Anterior | 169 | 76 (49.67%) | 93 (56.71%) | |
| Posterior | 55 | 26 (16.99%) | 29 (17.68%) | |
| Neutral | 93 | 51 (33.33%) | 42 (25.61%) | |
| Projection in coronal (%) | 0.801 | |||
| Superior | 105 | 51 (33.33%) | 54 (32.93%) | |
| Inferior | 101 | 51 (33.33%) | 50 (30.49%) | |
| Neutral | 111 | 51 (33.33%) | 60 (36.59%) | |
| Vessel size (mm) | 317 | 2.41 ± 0.58 | 2.28 ± 0.49 | 0.06 |
| Size (mm) | 317 | 4.06 ± 1.34 | 4.75 ± 1.20 | <0.001 |
| Aneurysm height (mm) | 317 | 2.67 ± 1.24 | 3.68 ± 1.18 | <0.001 |
| Perpendicular height (mm) | 317 | 2.34 ± 1.09 | 3.10 ± 1.07 | <0.001 |
| Width (mm) | 317 | 3.22 ± 1.22 | 3.53 ± 0.99 | 0.001 |
| Neck size (mm) | 317 | 3.49 ± 1.08 | 3.21 ± 0.80 | 0.01 |
| AR | 317 | 0.69 ± 0.32 | 1.01 ± 0.42 | <0.001 |
| SR | 317 | 1.17 ± 0.70 | 1.73 ± 0.82 | <0.001 |
| Bottleneck ratio | 317 | 0.93 ± 0.25 | 1.14 ± 0.36 | <0.001 |
| Height width ratio | 317 | 0.73 ± 0.21 | 0.89 ± 0.27 | <0.001 |
| Aneurysm angle (°) | 317 | 71.42 ± 16.61 | 65.87 ± 16.53 | 0.004 |
| Vessel angle (°) | 317 | 49.29 ± 25.22 | 53.97 ± 26.18 | 0.106 |
| Flow angle (°) | 317 | 135.63 ± 26.98 | 135.63 ± 29.81 | 0.797 |
| Parent daughter angle (°) | 317 | 87.43 ± 29.64 | 79.66 ± 23.17 | 0.005 |
M1, proximal segment of middle cerebral artery; Mbif, main middle cerebral artery bifurcation; Mdist, distal middle cerebral artery; AR, aspect ratio; and SR, size ratio.