Characteristics of patients with poor collaterals (n=129)
| Patient characteristics | Vessel recanalisation | Persistent vessel occlusion | Group comparison P value |
| Subjects, n (%) | 87 (67) | 42 (33) | na |
| Age in years, median (IQR) | 76 (65–82) | 73 (69–84) | 0.62 |
| Female sex, n (%) | 36 (42) | 17 (41) | 0.89 |
| Admission NIHSS, median (IQR) | 17 (15–20) | 19 (17–20) | 0.03 |
| ASPECTS, median (IQR) | 6 (5–8) | 4 (3–5) | <0.001 |
| Time onset to imaging in hours, mean (SD) | 2.9 (2.1) | 3.7 (1.6) | 0.03 |
| Mechanical thrombectomy, n (%) | 87 (100) | 17 (41) | <0.01 |
| Collateral Score, median (IQR) | 1 (1–2) | 1 (0–1) | 0.003 |
| Initial NWU in %, mean (SD) | 11.0 (5.6) | 10.6 (4.3) | 0.69 |
| Follow-up endpoints | |||
| Follow-up infarct volume in mL, median (IQR) | 35 (13-129) | 150 (90-206) | <0.001 |
| Follow-up NWU in %, mean (SD) | 19.5 (6.0) | 26.8 (6.4) | <0.001 |
| mRS, median (IQR)* | 4.5 (2–6) | 5 (5–6) | <0.001 |
| mRS 0–2, n (%) | 23 (26) | 1 (2) | <0.001 |
| mRS 3–4, n (%) | 19 (22) | 7 (17) | 1.0 |
| mRS 5–6, n (%) | 42 (48) | 33 (79) | <0.001 |
| *mRS score not available, n | 3 | 1 |
mRS, modified Rankin Scale; NIHSS, National Institutes of Health Stroke Scale; NWU, net water uptake.