Localization of arterial occlusive disease in the ischemic territorya
| Per Patient (Table 2) | Per Segment (Table 3) | |||
|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | |
| Anterior vs posterior circulation strokes | 6.7 | 5.6–7.9 | 2.8 | 2.5–3.1 |
| Intracranial segments | 4.6 | 3.7–5.6 | 2.5 | 2.2–2.8 |
| Extracranial segments | 5.8 | 4.5–7.4 | 4.6 | 3.7–5.9 |
| Intracranial vs extracranial localization | 1.6 | 1.4–1.8 | 0.6 | 0.6–0.8 |
| Anterior circulation | 1.5 | 1.3–1.7 | 0.5 | 0.4–0.5 |
| Posterior circulation | 1.8 | 1.4–2.4 | 0.9 | 0.7–1.2 |
| Tandem pattern: anterior vs posterior circulation | 5.0 | 3.7–6.7 | – | – |
↵a Results are expressed as odds ratios plus 95% confidence intervals.