TABLE 2.
The morphological and hemodynamic features of IAs in the primary cohort.
| Stable IAs n = 341 | Rebleeding IAs n = 70 | P value | |
| Location, n (%) | 0.470 | ||
| AcomA/ACA | 52 (15.2%) | 12 (17.1%) | |
| ICA | 159 (46.6%) | 27 (38.6%) | |
| MCA | 117 (34.3%) | 26 (37.1%) | |
| PC | 13 (3.8%) | 5 (7.1%) | |
| Bifurcation, n (%) | 142 (41.6%) | 42 (60.0%) | 0.005+ |
| Irregular shape, n (%) | 58 (17.0%) | 38 (54.3%) | <0.001+ |
| IAsize, mm, M ± SD | 5.6 ± 2.9 | 7.0 ± 2.7 | <0.001+ |
| Dome diameter, mm, M ± SD | 4.9 ± 3.5 | 5.0 ± 3.1 | 0.248 |
| Height, mm, M ± SD | 4.5 ± 2.4 | 4.7 ± 1.9 | 0.057 |
| AA,°, M ± SD | 88.8 ± 19.0 | 91.3 ± 23.2 | 0.859 |
| Volume, mm3, m (IQR) | 38.4 (19.7–69.4) | 40.1 (22.3–90.5) | 0.958 |
| Surface area, mm2, m (IQR) | 54.8 (33.2–132.1) | 50.2 (33.4–180.9) | 0.949 |
| AR, M ± SD | 1.2 ± 0.4 | 2.1 ± 0.8 | <0.001+ |
| SR, M ± SD | 2.1 ± 1.4 | 3.1 ± 2.2 | <0.001+ |
| UI, M ± SD | 0.3 ± 0.2 | 0.4 ± 0.3 | 0.541 |
| NSI, M ± SD | 0.3 ± 0.2 | 0.3 ± 0.2 | 0.732 |
| Bottleneck factor, M ± SD | 1.2 ± 0.4 | 1.5 ± 0.5 | <0.001+ |
| Height-to-width ratio, M ± SD | 1.5 ± 0.5 | 2.0 ± 0.9 | <0.001+ |
| WSSA, Pa, m (IQR) | 2.2 (1.2–3.7) | 2.7 (1.3–4.1) | 0.093 |
| NWSSA, m (IQR) | 0.42 (0.26–0.63) | 0.22 (0.18–0.28) | <0.001+ |
| WSSM, Pa, m (IQR) | 6.4 (4.0–9.9) | 6.7 (3.3–9.8) | 0.580 |
| NWSSM, m (IQR) | 1.4 (0.68–2.8) | 1.0 (0.57–2.6) | 0.227 |
| PA, kPa, m (IQR) | 2.3 (1.6–2.8) | 2.1 (1.3–2.5) | 0.173 |
| NPA, m (IQR) | 0.62 (0.44–0.80) | 0.57 (0.44–0.77) | 0.184 |
| WSSG, m (IQR) | 23.0 (16.5–29.1) | 16.5 (14.2–25.8) | 0.008+ |
| LSAR, m (IQR) | 0.28 (0.15–0.45) | 0.38 (0.23–0.54) | 0.010+ |
| OSI, x10–2, m (IQR) | 0.58 (0.20–0.97) | 0.70 (0.43–1.73) | <0.001+ |
| RRT, m (IQR) | 5.79 (3.74–8.22) | 4.57 (3.02–7.80) | 0.059 |
+The parameter with significant.
IAs, intracranial aneurysms; MCA, middle cerebral artery; ICA, internal carotid artery; AcomA, anterior communicating artery; ACA, anterior cerebral artery; PC, posterior circulation; AA, aneurysm inclination angle; AR, aspect ratio; SR, size ratio; UI, undulation index; NSI, non-sphericity index; WSSA, wall shear stress average; NWSSA, normalized wall shear stress average; WSSM, wall shear stress maximum; NWSSM, normalized wall shear stress maximum; PA, pressure average; NPA, normalized pressure average; WSSG, wall shear stress gradient; LSAR, low shear area ratio; OSI, oscillatory shear index; RRT, relative resident time.