Baseline characteristics of the original and propensity-matched cohort
| Baseline characteristics | Before propensity score matching | After propensity score matching | ||||
| Control cohort (n=902) | CVP cohort (n=11) | P value | Control cohort (n=16) | CVP cohort (n=8) | P value | |
| Age in years (mean±SD) | 73.0±13.0 | 70.9±15.7 | 0.601 | 66.9±16.5 | 68.5±18.1 | 0.834 |
| Female (%) | 473 (52.4) | 6 (54.5) | 1.000 | 13 (81.3) | 4 (50.0) | 0.266 |
| Arterial hypertension (%) | 597 (67.2) | 10 (90.9) | 0.178 | 12 (75.0) | 7 (87.5) | 0.859 |
| Diabetes mellitus (%) | 143 (16.1) | 5 (45.5) | 0.028 | 6 (37.5) | 3 (37.5) | 1.000 |
| Hyperlipoproteinemia (%) | 102 (11.5) | 7 (63.6) | 0.001 | 6 (37.5) | 4 (50.0) | 0.884 |
| Atrial fibrillation (%) | 293 (33.0) | 3 (27.3) | 0.939 | 4 (25.0) | 3 (37.5) | 0.874 |
| Stroke characteristics | ||||||
| Prestroke mRS score (median; Q1, Q3) | 0.0 (0.0, 1.0) | 0.0 (0.0, 0.0) | 0.418 | 0.0 (0.0, 0.3) | 0.0 (0.0, 0.3) | 0.968 |
| NIHSS score at onset (median; Q1, Q3) | 15 (10, 19) | 20 (14, 27) | 0.079 | 16.0 (12.8, 20.0) | 16.5 (11.5, 26.5) | 1.000 |
| ASPECTS (median; Q1, Q3) | 8.0 (6.0, 9.0) | 7.0 (5.0, 8.0) | 0.317 | 7.00 (3.5, 7.0) | 6.0 (5.0, 8.5) | 0.474 |
| Intravenous tPA (%) | 506 (57.0) | 1 (9.1) | 0.004 | 2 (12.5) | 1 (12.5) | 1.000 |
| Location of occlusion | ||||||
| Tandem occlusion (%) | 39 (4.6) | 1 (9.1) | 1 (6.2) | 1 (12.5) | ||
| ICA (%) | 42 (4.9) | 1 (9.1) | 3 (18.8) | 1 (12.5) | ||
| M1 proximal (%) | 227 (26.5) | 3 (27.3) | 6 (37.5) | 3 (37.5) | ||
| M1 distal (%) | 158 (18.5) | 1 (9.1) | 0 (0.0) | 1 (12.5) | ||
| M2 (%) | 135 (15.8) | 1 (9.1) | 1 (6.2) | 0 (0.0) | ||
| Posterior circulation (%) | 113 (13.2) | 4 (36.4) | 5 (31.3) | 2 (25.0) | ||
Categorical variables are shown as absolute numbers and percentages. Continuous variables are described by mean±SD or median and the first and third quartile (Q1, Q3). Percentages are given for patients with the full availability of the investigated variable.
ASPECTS, Alberta Stroke Programme Early CT Score; CVP, cardiovascular procedure; ICA, intracranial carotid artery; M1, first segment of middle cerebral artery; M2, second segment of middle cerebral artery; mRS, modified Rankin Scale; NIHSS, National Institutes of Health Stroke Scale; tPA, tissue plasminogen activator.