Demographic and aneurysm characteristics
| Variable | No. Stroke/No. Total (%) | OR (95% CI) | P Value |
|---|---|---|---|
| Age (yr) | 54.2 ± 15.6/57.0 ± 14.1 | 0.99 (0.97–1.01) | .2516 |
| Sex | |||
| Male | 8.1% (13/161) | 2.33 (1.15–4.70) | .0187 |
| Female | 3.6% (23/632) | Ref | |
| Hypertension | |||
| Yes | 9.2% (23/249) | 2.60 (1.26–5.33) | .0093 |
| No | 3.8% (12/318) | Ref | |
| Controlled hypertension | |||
| Yes | 8.7% (18/206) | 3.03 (1.54–5.94) | .0013 |
| No | 0.0% (0/4) | Ref | |
| Current smoker | |||
| Yes | 4.3% (4/94) | 0.93 (0.32–2.68) | .8878 |
| No | 4.6% (32/699) | Ref | |
| Aneurysm location | |||
| Posterior circulation | 6.7% (6/89) | 1.62 (0.66–4.02) | .2940 |
| Anterior circulation | 4.3% (30/704) | Ref | |
| Aneurysm location by vessel | |||
| Internal carotid artery | 3.9% (23/590) | Ref | |
| Anterior cerebral artery | 12.5% (1/8) | 4.83 (0.72–32.44) | .1052 |
| Basilar artery | 9.3% (4/43) | 2.75 (0.94–8.02) | .0636 |
| Middle cerebral artery | 12.5% (5/40) | 3.74 (1.38–10.16) | .0096 |
| PcomA | 1.9% (1/53) | 0.69 (0.13–3.74) | .6668 |
| Vertebral artery | 6.1% (2/33) | 1.92 (0.49–7.55) | .3523 |
| Other | 0.0% (0/26) | 0.46 (0.03–8.12) | .5928 |
| Rupture status | |||
| Ruptured | 5.4% (4/74) | 1.23 (0.42–3.57) | .7074 |
| Unruptured | 4.5% (32/719) | Ref | |
| Aneurysm type | |||
| Saccular | 3.2% (19/600) | Ref | |
| Fusiform | 12.7% (13/102) | 4.47 (2.13–9.36) | .0001 |
| Dissecting | 3.8% (2/53) | 1.20 (0.27–5.29) | .8105 |
| Other | 5.3% (2/38) | 1.70 (0.38–7.58) | .4873 |
| Aneurysm size | |||
| <10 mm | 2.6% (10/387) | Ref | |
| 10–24.9 mm | 4.7% (16/338) | 1.87 (0.84–4.19) | .1260 |
| ≥25 mm | 14.3% (9/63) | 6.28 (2.44–16.16) | .0001 |
Note:—Ref. indicates reference; PcomA, posterior communicating artery.