Clinical characteristics
| Characteristic | Isodense (n=25) | Hyperdense (n=42) | p Value |
| NIHSS | 18.4 | 19.9 | 0.379 |
| Age | 73 | 67 | 0.186 |
| Female | 68% (17/25) | 57% (24/42) | 0.268 |
| Received IV tPA | 32% (8/25) | (36%) 15/42 | 0.797 |
| Clot location | 0.069 | ||
| MCA | 80% (20/25) | 55% (23/42) | |
| ICA | 20% (5/25) | 36% (15/42) | |
| Basilar | 0% (0/25) | 10% (4/42) | |
| CT density ratio | 1.03 | 1.46 | <0.001 |
| Stroke etiology | 0.063 | ||
| Cardioembolic | 80% (20/25) | 69% (29/42) | |
| Extracranial arterial disease | 4% (1/25) | 24% (10/42) | |
| Intracranial arterial disease | 4% (1/25) | 0% (0/42) | |
| Cryptogenic | 12% (3/25) | 7% (3/42) | |
| Time to treatment (mean ± SEM) | 455.2±53.1 | 394.1±37.6 | 0.341 |
| Number of attempts (mean ± SEM) | 2.52±0.64 | 2.88±0.48 | 0.361 |
| Successful recanalization | 36% (9/25) | 79% (33/42) | 0.001 |