Correlation coefficients of the intracranial ARV and the CAR of external carotid artery with basic information parameters in all participants (n=297)
| Variables | Suzuki stage | mRS score | ARV |
| ARV | |||
| Ischaemic | −0.297** | −0.004 | |
| Haemorrhagic | −0.270** | −0.050 | |
| Total | −0.315** | −0.060 | |
| CAR | |||
| Ischaemic | 0.117 | −0.005 | 0.314** |
| Haemorrhagic | −0.038 | −0.077 | 0.391** |
| Total | 0.064 | −0.084 | 0.340** |
**p < 0.001.
ARV, arterial residual volumes; CAR, collateralisation angiogenesis ratio; mRS, modified Rankin Scale.