Patient characteristics, overall and according to the macroscopic appearance of clots
| Characteristics | Overall (n=255) | Macroscopic appearance | P value | |
| Red (n=233) | White (n=22) | |||
| Age, years | 71 (60 to 82) | 72 (61 to 83) | 56 (32 to 85) | <0.001 |
| Men | 135/255 (52.9) | 125/233 (53.6) | 10/22 (45.5) | 0.46 |
| Prestroke mRS score ≥1 | 31/255 (12.2) | 27/233 (11.6) | 4/22 (18.2) | 0.32 |
| NIHSS score* | 18 (13 to 21) | 18 (13 to 22) | 15 (13 to 17) | 0.015 |
| Occlusion site | ||||
| ICA | 58/255 (22.7) | 53/233 (22.7) | 5/22 (22.7) | 0.60 |
| MCA-M1 | 135/255 (52.9) | 122/233 (52.4) | 13/22 (59.1) | |
| MCA-M2 | 32/255 (12.5) | 28/233 (12.0) | 4/22 (18.2) | |
| Tandem | 14/255 (5.5) | 14/233 (6.0) | 0/0 (0.0) | |
| Vertebrobasilar | 16/255 (6.3) | 16/233 (6.9) | 0/0 (0.0) | |
| Clot length, mm* | 14 (9 to 22) | 15 (9 to 23) | 8 (5 to 16) | 0.010 |
| Use of IVT before MT | 110/255 (43.1) | 100/233 (42.9) | 10/22 (45.5) | 0.82 |
| MT technique | ||||
| Clot aspiration | 135/255 (52.9) | 125/233 (53.6) | 10/22 (45.5) | 0.61 |
| Stent retriever | 22/255 (8.6) | 19/233 (8.2) | 3/22 (13.6) | |
| Both | 98/255 (38.4) | 89/233 (38.2) | 9/22 (40.9) | |
| Final recanalization grade | ||||
| No (mTICI score 0-2a) | 36/255 (14.1) | 31/233 (13.3) | 5/22 (22.7) | 0.35 |
| Partial (mTICI score 2b) | 56/255 (22.0) | 50/233 (21.5) | 6/22 (27.3) | |
| Near complete (mTICI score 2c) | 52/255 (20.4) | 50/233 (21.5) | 2/22 (9.1) | |
| Complete (mTICI score 3) | 111/255 (43.5) | 102/233 (43.8) | 9/22 (40.9) | |
Values expressed as no/total no (%) or median (interquartile).
*n=1 missing value.
ICA, internal carotid artery; IVT, intravenous thrombolysis; MCA, middle cerebral artery; mRS, modified Rankin Scale; MT, mechanical thrombectomy; mTICI, modified Thrombolysis in Cerebral Infarction; NIHSS, National Institutes of Health Stroke Scale.