Table 1. Baseline Characteristics Based on DTA vs Repeated Imaging.
| Characteristic | Patient groupa | |
|---|---|---|
| DTA (n = 327) | Repeated imaging (n = 813) | |
| Age, median (IQR), y | 68 (59-78) | 69 (59-78) |
| Sex | ||
| Female | 152/326 (46.6) | 377/812 (46.4) |
| Male | 174/326 (53.4) | 435/812 (53.6) |
| Side of occlusion | ||
| Right | 161/326 (49.4) | 377/812 (46.4) |
| Left | 165/326 (50.6) | 434/812 (53.4) |
| Bilateral | 0 | 1/812 (0.1) |
| Presentation mRS score, median (IQR)b | 0 (0-1) | 0 (0-1) |
| Presentation NIHSS score, median (IQR)c | 17 (12-20) | 17 (13-21) |
| Presentation glucose level, median (IQR), mg/dL | 118 (104-148) | 129 (109-164) |
| Onset type witnessed | 188/318 (59.1) | 262/686 (38.2) |
| Alteplase administered | 200/327 (61.2) | 412/808 (51.0) |
| If imaging repeated, was NCCT repeated? | NA | 517/811 (63.7) |
| If imaging repeated, was CTA repeated? | NA | 494/811 (60.9) |
| If imaging repeated, was CTP repeated? | NA | 419/687 (61.0) |
| Clot location | ||
| ICA | ||
| Cervical | 16/327 (4.9) | 13/813 (1.6) |
| Intracranial | 83/327 (25.4) | 224/813 (27.6) |
| MCA M1 | 172/327 (52.6) | 426/813 (52.4) |
| MCA M2 | 56/327 (17.1) | 150/813 (18.5) |
| Anesthesia | ||
| Conscious sedation | 169/314 (53.8) | 367/686 (53.5) |
| General | 145/314 (46.2) | 319/686 (46.5) |
| ASPECTS, median (IQR)d | ||
| EVT center | NA | 8.0 (7.0-9.0) |
| Transferring center | 9.0 (9.0-10.0) | 8.0 (7.0-9.0) |
| Time from LKW to arrival at EVT hospital, median (IQR), min | 269 (190-430) | 280 (190-518) |
| Time from LKW to intravenous alteplase bolus, median (IQR), min | 150 (100-240) | 120 (82-176) |
| Time from LKW to procedure, median (IQR), min | 320 (226-495) | 351 (260-587) |
| Time from arrival at EVT center to groin puncture, median (IQR), min | 34 (20-62) | 60 (37-95) |
Abbreviations: ASPECTS, Alberta Stroke Program Early Computed Tomographic Score; CTA, computed tomographic (CT) angiogram; CTP, CT perfusion; DTA, direct to angiography; EVT, endovascular thrombectomy; ICA, internal cerebral artery; IQR, interquartile range; LKW, last-known-well time; MCA, middle cerebral artery; mRS, modified Rankin Scale; NA, not applicable; NCCT, non–contrast-enhanced CT; NIHSS, National Institutes of Health Stroke Scale.
SI conversion factor: To convert glucose to mmol/L, multiply by 0.0555.
Unless otherwise indicated, data are expressed as No./total No. (%) of patients. Owing to missing data, numbers may not total column headings.
Scores range from 0 to 6, with higher scores indicating worse function.
Scores range from 0 to 42, with higher scores indicating higher stroke severity.
Scores range from 0 to 10, with lower scores indicating more ASPECTS areas demonstrating early ischemic changes on NCCT.