Grading of axis deviation (WEB device axis from the aneurysm axis)
| Collective Distribution (No.) | Mean ± IQR (BOSS 1 vs all Other BOSS Grades), P Value | |||
|---|---|---|---|---|
| All (67) | BOSS 1 (11) | BOSS 0, 0′, 2, 3 (56) | ||
| Working projection of bifurcation | ||||
| A (0°–15°) | 48 (71.6%) | 4 (36.4%) | 44 (78.6%) | 17 ± 17 vs 7 ± 11, P = .023 |
| B (16°–30°) | 15 (22.4%) | 5 (45.4%) | 10 (17.8%) | |
| C (31°–45°) | 3 (4.5%) | 2 (18.2%) | 1 (1.8%) | |
| Not ratable | 1 (1.5%) | 0 (0.0%) | 1 (1.8%) | |
| Perpendicular to bifurcation | ||||
| A (0°–15°) | 58 (86.6%) | 8 (72.8%) | 50 (89.3%) | 10 ± 10 vs 8 ± 9, P = .169 |
| B (16°–30°) | 8 (11.9%) | 2 (18.2%) | 6 (10.7%) | |
| C (31°–45°) | 1 (1.5%) | 1 (9.0%) | 0 (0.0%) | |