Primary and secondary outcomes
| Factor | Total patients (n) (n=1676) | P value | Common OR (95% CI) |
| mRS at 90 days* | 1676 | 0.122 | 1.150 (0.96 to 1.37) |
| Age | 1676 | <0.001 | 1.027 (1.020 to 1.033) |
| Admission NIHSS | 1676 | <0.001 | 1.085 (1.070 to 1.099) |
| Baseline mRS | 1676 | <0.001 | 1.442 (1.322 to 1.574) |
| Poor reperfusion | 221 | <0.001 | 3.256 (2.433 to 4.357) |
| Site of occlusion | |||
| ICA | 421 | Reference | |
| Proximal anterior circulation | 897 | 0.013 | 0.754 (0.603 to 0.942) |
| Distal anterior circulation | 404 | 0.019 | 0.732 (0.564 to 0.950) |
| Posterior circulation | 265 | 0.040 | 1.450 (1.017 to 2.069) |
*Reference: patients who presented during the ‘on-hour’ period.
CI, confidence interval; ICA, internal carotid artery; mRS, modified Rankin Scale; NIHSS, National Institutes of Health Stroke Scale; OR, odds ratio.