Clinical characteristics of the two groups in the model
| Characteristic | On-hours (n=721) | Off-hours (n=1136) | P value |
| Age (years) (mean (SD)) | 68.89 (14.86) | 67.58 (14.64) | 0.063 |
| Baseline mRS (%) | 0.046 | ||
| 0 | 62.3% | 65.6% | |
| 1 | 18.8% | 18.0% | |
| 2 | 8.2% | 8.7% | |
| 3 | 7.0% | 5.0% | |
| 4 | 3.7% | 2.2% | |
| 5 | 0% | 0.6% | |
| Admission NIHSS score (mean (SD)) | 15.98 (7.12) | 15.83 (7.04) | 0.660 |
| ASPECTs score* | |||
| ≥6 | 94.5% | 94.3% | 0.999 |
| <6 | 5.5% | 5.7% | |
| Site of occlusion | 0.245 | ||
| ICA | 23.5% | 21.6% | |
| Proximal anterior circulation | 48.1% | 45.8% | |
| Distal anterior circulation | 20.3% | 22.4% | |
| Posterior circulation | 8.1% | 10.2% | |
| Received intravenous tPA | 41.8% | 47.6% | 0.018 |
| Onset to groin puncture (min) (mean (SD)) | 424.56 (458.12) | 445.67 (626.05) | 0.450 |
| Procedure time (min) (mean (SD)) | 42.28 (33.83) | 43.39 (58.42) | 0.655 |
| Successful reperfusion | 88.8% | 88.0% | 0.663 |
| Hemorrhagic transformation | 30.3% | 33.9% | 0.145 |
| LOS (days) (mean (SD)) | 11.09 (12.06) | 10.46 (10.48) | 0.241 |
*ASPECTs scores missing in 224 (31.1%) ‘On’ patients and 337 (33.2%) ‘Off’ patients.
ASPECTS, Alberta Stroke Program Early CT Score; ICA, internal carotid artery; LOS, length of stay; mRS, modified Rankin Scale; NIHSS, National Institutes of Health Stroke Scale; TICI, Thrombolysis In Cerebral Infarction; tPA, tissue plasminogen activator.