ASPECT scores according to intracranial arterial lesion location for the IMS-1 cohort
| Occlusion Location (n) | ASPECTS (median, iqr) | ASPECTS > 7 (%, n/N) | Outcome: mRS 0–1 (%, n/N) | |
|---|---|---|---|---|
| ASPECTS > 7 | ASPECTS ≤ 7 | |||
| Carotid T (15) | 4 (3–7) | 13% (2/15) | 0% (0/2) | 0% (0/13) |
| M1 (26) | 6 (4–8) | 31% (8/26) | 50% (4/8) | 17% (3/18) |
| M2 (20) | 7 (5–9.5) | 45% (9/20) | 33% (3/9) | 36% (4/11) |
| M3 (6) | 7 (5–9) | 33% (2/6) | 50% (1/2) | 50% (2/4) |
| None (6) | 10 (9–10) | 83% (5/6) | 60% (3/5) | 100% (1/1) |
| ACA (2) | 6.5 (3–10) | 50% (1/2) | 0% (0/1) | 100% (1/1) |
| VB (2) | 8.5 (8–9) | 100% (2/2) | 50% (1/2) | — |
Note:—Three patients did not undergo angiography and thus lesion location was not determined. Intracranial arterial lesion location was determined independent of any extracranial artery occlusion. T indicates carotid T occlusion; M1, M1 segment middle cerebral artery; M2, M2 segment middle cerebral artery; M3, M3 segment middle cerebral artery; ACA, anterior cerebral artery; VB, vertebrobasilar arteries; ASPECTS, Alberta Stroke Program Early CT score; mRS, modified Rankin Scale score; iqr, interquartile range.