Distribution of the study variables and association with aneurysm rupture based on crude and adjusted prevalence ratios according to the Poisson regression model with robust variance and their respective 95% CIs
| Variables | Crude PR | Adjusted PR | ||
|---|---|---|---|---|
| PR (95% CI) | P Value | PR (95% CI) | P Value | |
| Sex | .428 | .938 | ||
| Female | 1 | – | 1 | – |
| Male | 1.09 (0.88–1.37) | .428 | 1.01 (0.81–1.25) | .938 |
| Age | .413 | .640 | ||
| 55 yr or younger | 1.09 (0.88–1.36) | .413 | 1.05 (0.83–1.31) | .640 |
| Older than 55 yr | 1 | – | 1 | – |
| Aneurysm location | .009 | .022 | ||
| Postsiphon | 1.18 (0.91–1.52) | .208 | 1.11 (0.86–1.44) | .416 |
| Supraclinoid segment | 1 | – | 1 | – |
| Aneurysm size | .134 | .445 | ||
| ≤5 mm | 3.92 (1.04–14.81) | .044 | 2.18 (0.57–8.27) | .252 |
| 6–10 mm | 3.49 (0.92–13.27) | .066 | 1.96 (0.51–7.52) | .326 |
| 11–25 mm | 3.20 (0.83–12.42) | .092 | 1.91 (0.49–7.40) | .350 |
| >25 mm | 1 | – | 1 | – |
| Anterior knee angle | .001 | .005 | ||
| ≤15.40° | 1 | – | 1 | – |
| >15.40° | 1.45 (1.16–1.80) | .001 | 1.36 (1.09–1.69) | .005 |
| Posterior knee angle | .685 | .773 | ||
| ≤88.15° | 1 | – | 1 | – |
| >88.15° | 1.05 (0.84–1.30) | .685 | 1.03 (0.84–1.27) | .773 |
Note:—PR indicates prevalence ratio.