Baseline demographics and CTA clot characteristics stratified by the 2 populations that form part of the overall study
| Calgary CTA Data Base (n = 165) | Keimyung Stroke Registry (n = 63) | P Value | |
|---|---|---|---|
| Age (yr) (mean) | 66.4 ± 14.3 | 69.5 ± 9.96 | .12 |
| Sex (male) (%) | 49.1% | 53.9% | .5 |
| Baseline NIHSS (median) (IQR) | 18 (8) | 14 (6) | .01 |
| Onset to IV tPA time (minutes) (median) (IQR) | 112 (73) | 125 (57) | .18 |
| IV tPA initiation to first angiography run time (minutes) (median) (IQR) | 53 (45) | 139 (75) | .01 |
| Site of occlusion (No.) (%) | |||
| Carotid-T/-L | 13 (8%) | 1 (1.6%) | .09 |
| Tandem occlusions | 38 (23%) | 23 (36.5%) | |
| M1 MCA | 86 (52.1%) | 31 (49.2%) | |
| M2 MCA | 28 (17%) | 8 (12.7%) | |
| Very early arterial-weighted CTA (preclot HU < 150 and preclot HU ≥ HU at the torcula) (No.) (%) | 0 (0%) | 2 (3.2%) | .07 |
| Very late venous phase CTA (preclot HU < 150 and preclot HU < HU at the torcula) (No.) (%) | 1 (0.6%) | 2 (3.2%) | .19 |
| Residual flow (%) | 21.8% | 4.8% | .01 |
| Clot length (mm) (median) (IQR) | 22.3 (34.5) | 50 (30.6) | .01 |
| cirHU (median) (IQR) | 1.5 (0.85) | 2.8 (1.5) | .01 |
| M1 MCA origin to proximal clot interface distance (mm) (median) (IQR) | 10.6 (7.6) | 9.6 (11.3) | .74 |