Table 3 Univariable and multivariable logistic regression for the presence of a basilar tip aneurysm (N = 313).
From: Surrounding vascular geometry associated with basilar tip aneurysm formation
Variables | Univariable | Multivariable N = 313 | Multivariablea N = 139 | Multivariableb N = 313 | ||||
|---|---|---|---|---|---|---|---|---|
OR (95% CI) | P-val | OR (95% CI) | P-val | OR (95% CI) | P-val | OR (95% CI) | P-val | |
Age | 1.02 (1.00–1.05) | 0.02 | – | – | – | – | – | – |
Female | 0.78 (0.44–1.38) | 0.39 | – | – | – | – | – | – |
Alcohol use (current) | 0.85 (0.53–1.36) | 0.49 | – | – | – | – | – | – |
Tobacco use (current) | 1.01 (0.62–1.64) | 0.96 | – | – | – | – | – | – |
Hypertension | 1.28 (0.80–2.05) | 0.30 | – | – | – | – | – | – |
Family history of SAH | 0.76 (0.43–1.33) | 0.34 | – | – | – | – | – | – |
Family history of aneurysms | 1.06 (0.49–2.26) | 0.89 | – | – | – | – | – | – |
Ruptured aneurysm | 0.94 (0.59–1.52) | 0.81 | – | – | – | – | – | – |
Hypoplastic PCoA | ||||||||
Unilateral vs. no | 1.63 (0.87–3.06) | 0.13 | – | – | – | – | – | – |
Bilateral vs. no | 1.51 (0.79–2.88) | 0.21 | – | – | – | – | – | – |
Aplastic PCoA | ||||||||
Unilateral vs. no | 9.26 (1.14–1201) | 0.03 | – | – | ||||
Bilateral vs. no | 4.90 (0.52–652) | 0.19 | – | – | ||||
Fetal PCoA | ||||||||
Unilateral vs. no | 0.77 (0.30–1.94) | 0.57 | – | – | – | – | – | – |
Bilateral vs. no | 2.55 (0.29–22.2) | 0.40 | – | – | – | – | – | – |
Vertebral dominance | 0.77 (0.44–1.33) | 0.35 | – | – | – | – | – | – |
Daughter diameter ratio (larger/smaller) | 0.56 (0.23–1.35) | 0.20 | – | – | – | – | – | – |
Parent artery (basilar artery) diameter in mm | 0.49 (0.29–0.83) | < 0.01 | 0.18 (0.06–0.46) | < 0.01 | 0.17 (0.03–0.73) | 0.02 | 0.52 (0.29–0.93) | 0.03 |
Diameter size ratio (Parent/(D1 + D2)) | 4.36 × 10−4 (3.06 × 10−5–0.005) | < 0.01 | 0.001 (2.76 × 10−5–0.05) | < 0.01 | 6.80 × 10−6 (2.65 × 10−10–0.04) | 0.01 | 4.27 × 10−4 (2.87 × 10−5–0.005) | < 0.01 |
Daughter–daughter angle in degrees | 1.11 (1.08–1.13) | < 0.01 | 1.11 (1.08–1.14) | < 0.01 | 1.10 (1.06–1.15) | < 0.01 | – | – |
Parent–daughter angle ratio | 24.94 (5.86–106.1) | < 0.01 | – | – | – | – | – | – |
