Table 1 Data in patients with and without MCA bifurcation aneurysms.
Variables | Aneurysm patients (121) | Patients without aneurysms (517) | P | ||||
|---|---|---|---|---|---|---|---|
Total | F | M | Total | F | M | ||
Age (y) | 21–92 (58.1 ± 13.7) | 57.40 ± 14.52 | 60.53 ± 10.44 | 18–88 (55.2 ± 13.8) | 56.23 ± 13.97 | 54.99 ± 13.24 | 0.86 |
F/M | 89/32 | NA | NA | 351/155 | NA | NA | NA |
MCA bifurcation angle (°) | 51.4–247.8 (149.2 ± 32.6) | 147.9 ± 31.7 | 153.5 ± 37.1 | 40–229 (107.2 ± 26.3) | 106.78 ± 26.37 | 108.13 ± 26.90 | < 0.0001 |
Smaller M1-M2 angle (°) | 46.1–163.3 (82.0 ± 23.7) | 85.0 ± 24.09 | 72.37 ± 20.08 | 13.7–173.8 (109.1 ± 22.7) | 109.25 ± 23.47 | 109.99 ± 21.05 | < 0.0001 |
Larger M1-M2 angle (°) | 58.8–169.5 (123.2 ± 25.2) | 124.45 ± 24.25 | 121.95 ± 28.19 | 71.8–177.2 (139.5 ± 16.9) | 139.17 ± 16.96 | 139.38 ± 16.34 | < 0.001 |
LA ratio | 0.4–3.5 (1.7 ± 0.6) | 1.6 ± 0.6 | 1.85 ± 0.8 | 0.5–8.4 (1.4 ± 0.5) | 1.29 ± 0.51 | 1.26 ± 0.58 | 0.007 |
M1 diameter (mm) | 1.6–5.1 (2.7 ± 0.9) | 2.45 ± 0.89 | 2.89 ± 0.41 | 1.3–6.3 (3.2 ± 1.3) | 3.11 ± 1.30 | 3.37 ± 1.39 | 0.03 |
Smaller M2 diameter (mm) | 1.25–3.55 (2.2 ± 0.6) | 2.12 ± 0.50 | 2.10 ± 0.65 | 0.6–5.4 (2.3 ± 0.9) | 2.19 ± 0.83 | 2.39 ± 0.98 | 0.06 |
Larger M2 diameter (mm) | 0.9–7.1 (2.6 ± 1.2) | 2.27 ± 0.59 | 2.9 ± 0.98 | 0.7–8.2 (2.7 ± 1.2) | 2.65 ± 1.21 | 2.97 ± 1.31 | 0.16 |
DA ratio | 0.4–2.0 (1.2 ± 0.4) | 1.1 ± 0.3 | 1.4 ± 0.3 | 0.3–4.5 (1.3 ± 0.5) | 1.29 ± 0.51 | 1.26 ± 0.58 | 0.76 |
Aneurysm size (mm) | 1.6–13.8 (5.4 ± 2.4) | 5.39 ± 2.25 | 4.64 ± 1.95 | NA | NA | NA | NA |
