Table 1.
Patient demographics
| Collateral grades 0–2 | Collateral grades 3–4 | p Value | |
|---|---|---|---|
| Number | 66 | 51 | |
| Age (mean±SD) | 68±17 | 65±17 | 0.51 |
| Female (%) | 45 (68%) | 27 (53%) | 0.13 |
| Ethnicity (%) | |||
| White | 57 (86%) | 32 (63%) | <0.01 |
| Black | 4 (6%) | 9 (18%) | 0.07 |
| Asian | 1 (2%) | 4 (8%) | 0.17 |
| History of hypertension | 42 (64%) | 29 (57%) | 0.57 |
| History of diabetes | 16 (24%) | 9 (18%) | 0.5 |
| History of HLD | 21 (32%) | 13 (26%) | 0.54 |
| Prior stroke or TIA | 12 (18%) | 4 (8%) | 0.06 |
| History of atrial fibrillation | 26 (39%) | 15 (29%) | 0.33 |
| Active smoking | 8 (12%) | 8 (16%) | 0.6 |
| Statin use | 12 (18%) | 12 (24%) | 0.82 |
| Baseline mRS | |||
| 0 | 63 (96%) | 48 (94%) | 1 |
| 1 | 1 (2%) | 1 (2%) | 1 |
| 2 | 2 (3%) | 2 (4%) | 1 |
| NIHSS | 19 [14–21] | 13 [8–19] | <0.01 |
| Target vessel | |||
| ICA | 22 (33%) | 13 (26%) | 0.42 |
| M1 | 37 (56%) | 29 (57%) | 1 |
| M2 or beyond | 7 (11%) | 9 (18%) | 0.29 |
| Left hemisphere | 35 (53%) | 30 (59%) | 0.58 |
| Mechanism | |||
| Cardioembolism | 33 (50%) | 26 (51%) | 1 |
| Large artery disease | 16 (24%) | 16 (31%) | 0.41 |
| Small artery disease | 0 (0%) | 1 (2%) | 0.44 |
| LKWT to ED arrival (min) | 228±186 | 210±205 | 0.54 |
| LKWT to DWI/PWI (min) | 299±183 | 260±232 | 0.28 |
| LKWT to groin puncture (min) | 364±178 | 340±235 | 0.72 |
All values expressed as median±SD or n (%) otherwise indicated.
DWI, diffusion weighted imaging; ED, emergency department; HLD, hyperlipidemia; ICA, internal carotid artery; mRS, modified Rankin scores; LKWT, last known well time; NIHSS, NIH stroke scale; PWI, perfusion weighted imaging; TIA, transient ischemic attack.