Baseline characteristics before and after matchinga
| Before Matching | P | After Matching | P | |||
|---|---|---|---|---|---|---|
| ST 6 (n = 256) | ST 4 (n = 372) | ST 6 (n = 169) | ST 4 (n = 169) | |||
| Age (median) (IQR) (yr) | 68 (58–75) | 64 (53–73) | .003 | 67 (56–75) | 64 (53–73) | .103 |
| Women (No.) (%) | 112 (43.8%) | 150 (40.3%) | .392 | 71 (42%) | 64 (37.9%) | .505 |
| AF (No.) (%) | 131 (51.2%) | 138 (37.2%) | .001 | 80 (47.3%) | 67 (39.6%) | .160 |
| Hypertension (No.) (%) | 158 (61.7%) | 231 (62.1%) | .924 | 112 (66.3%) | 105 (62.1%) | .500 |
| Diabetes mellitus (No.) (%) | 45 (17.6%) | 66 (17.7%) | .958 | 35 (20.7%) | 29 (17.2%) | .488 |
| Current smoker (No.) (%) | 69 (27%) | 92 (24.7%) | .531 | 49 (29%) | 41 (24.3%) | .389 |
| SBP (median) (IQR) (mm Hg) | 145 (130–161) | 144 (130–160) | .537 | 148 (129–163) | 148 (130–160) | .393 |
| GLU (median) (IQR) (mmol/L) | 6.9 (5.83–8.9) | 6.7 (5.77–8.38) | .173 | 6.83 (5.6–9.25) | 6.9 (5.81–8.69) | 1.000 |
| ASPECTS (median) (IQR) | 9 (7–10) | 9 (8–10) | .001 | 9 (7–10) | 9 (8–10) | .784 |
| NIHSS (median) (IQR) | 17 (13–21) | 16 (12–20) | .029 | 17 (13–21) | 17 (13–21) | 1.000 |
| IV (No.) (%) | 81 (31.6%) | 119 (32%) | .927 | 56 (33.1%) | 61 (36.1%) | .657 |
| Time from onset to visit (median) (IQR) (min) | 130 (75–230) | 120 (60–214) | .058 | 138 (64–224) | 120 (58–214) | .316 |
| Time from onset to puncture (median) (IQR) (min) | 280 (210–350) | 270 (205–347) | .692 | 279 (202–345) | 270 (195–346) | .589 |
| Stroke subtype | ||||||
| Atherosclerotic (No.) (%) | 95 (37.1%) | 171 (46%) | .027 | 68 (40.2%) | 73 (43.2%) | .644 |
| Cardiac embolism (No.) (%) | 146 (57%) | 177 (47.5%) | .02 | 90 (53.3%) | 85 (50.3%) | .657 |
| Undetermined etiology (No.) (%) | 15 (5.9%) | 24 (6.5%) | .763 | 11 (6.5%) | 11 (6.5%) | 1.000 |
| Artery occlusion site | ||||||
| ICA (No.) (%) | 155 (60.5%) | 86 (23.1%) | <.001 | 78 (46.2%) | 76 (45%) | .791 |
| MCA (No.) (%) | 100 (39.1%) | 284 (76.3%) | <.001 | 90 (53.3%) | 93 (55%) | .607 |
| ACA (No.) (%) | 1 (0.4%) | 2 (0.5%) | 1.000 | 1 (0.6%) | 0 | 1.000 |
| Collateral flow grade (ASITN/SIR) | <.001 | .261 | ||||
| 0–1 (No.) (%) | 156 (61.2%) | 156 (42.2%) | 93 (55%) | 83 (49.1%) | ||
| 2–3 (No.) (%) | 99 (38.8%) | 214 (57.8%) | 76 (45%) | 86 (50.9%) | ||
Note:—ASITN/SIR indicates American Society of Interventional and Therapeutic Neuroradiology, Society of Interventional Radiology; AF, atrial fibrillation; GLU, glucose; ACA, anterior cerebral artery; SBP, systolic blood pressure.
↵a The logistic regression model used for the determination of the propensity score included the following factors: age, sex, atrial fibrillation, hypertension, diabetes, time from onset to groin puncture, NIHSS score, ASPECTS, stroke subtype, site of vessel occlusion, and collateral blood flow.