Table 1.
Patients' baseline characteristics and imaging modalities
| Total | JR-NET 1 | JR-NET 2 | p | |
|---|---|---|---|---|
| n | 1,409 | 619 | 790 | |
| Age, mean ± SD (range) | 69.8 ± 11.9 (6–96) | 69.5 ± 11.4 (16–96) | 70.0 ± 12.2 (6–93) | 0.237 |
| Male (%) | 896/1,391 (64.4) | 400/601 (66.6) | 496/790 (62.8) | 0.146 |
| NIHSS | (n = 875) | (n = 293) | (n = 582) | |
| Baseline NIHSS, median (IQR) | 18 (11–23) | 17 (11–24) | 18 (12–22) | 0.969 |
| NIHSS < 8 (%) | 102 (11.7) | 37 (12.6) | 65 (11.2) | 0.525 |
| Stroke subtypes (%) | (n = 1,249) | (n = 471) | (n = 778) | 0.660 |
| Cardioembolic | 811 (64.9) | 305 (64.8) | 506 (65.0) | |
| Atherothrombotic | 282 (22.6) | 103 (21.9) | 179 (23.0) | |
| Iatrogenic | 44 (3.5) | 21 (4.5) | 23 (3.0) | |
| Others | 44 (3.5) | 18 (3.8) | 26 (3.3) | |
| Unknown | 68 (5.4) | 24 (5.1) | 44(5.7) | |
| Culprit occluded artery (%) | (n = 1,248) | (n = 470) | (n = 778) | < 0.001 |
| ICA | 264 (21.2) | 84 (17.9) | 180 (23.1) | |
| MCA | 661 (53.0) | 269(57.2) | 391 (50.3) | |
| BA | 257 (20.6) | 82 (17.4) | 174 (22.4) | |
| Other arteries | 68 (5.4) | 35 (7.4) | 33 (4.2) | |
| Imaging modalities (%) | (n = 1,212) | (n = 455) | (n = 757) | |
| CT | 677 (55.9) | 299 (65.7) | 378 (49.9) | < 0.001 |
| MRI | 1,048 (86.5) | 363 (79.8) | 685 (90.5) | < 0.001 |
| Onset-to-treatment time (%) | (n = 1,184) | (n = 453) | (n = 731) | < 0.001 |
| < 3 h | 443 (37.4) | 221 (48.8) | 222 (30.4) | |
| 3–6 h | 520 (43.9) | 183 (40.4) | 337 (46.1) | |
| 6–12 h | 137 (11.6) | 34 (7.5) | 103 (14.1) | |
| ≥ 12 h | 84 (7.1) | 15 (3.3) | 69 (9.4) |
BA: basilar artery, CT: computed tomography, ICA: internal carotid artery, IQR: interquartile range, JR-NET: Japanese Registry of Neuroendovascular Therapy, MCA: middle cerebral artery, MRI: magnetic resonance imaging, NIHSS: National Institutes of Health Stroke Scale.