Clinical characteristics of patients in the unadjusted data versus propensity score–weighted data (n=490)
| Characteristics | Before propensity weighting | After propensity weighting | ||||
| Perfusion cohort | Collateral cohort | Standardised difference | Perfusion cohort | Collateral cohort | Standardised difference | |
| Age | 66.04 | 68.72 | –0.187 | 67.38 | 67.65 | –0.019 |
| Males | 53 | 48 | 0.101 | 53 | 49 | 0.073 |
| Wake-up stroke | 43 | 62 | –0.392 | 50 | 53 | –0.069 |
| ASPECTS | 8.17 | 8.02 | 0.102 | 8.13 | 7.99 | 0.097 |
| Occlusion site | ||||||
| Terminal ICA | 22 | 21 | 0.031 | 21 | 21 | –0.002 |
| M1 | 60 | 61 | –0.032 | 60 | 62 | –0.045 |
| M2 | 17 | 10 | 0.196 | 16 | 13 | 0.071 |
| Tandem occlusion | 22 | 16 | 0.165 | 20 | 19 | 0.022 |
| Alteplase given | 9 | 7 | 0.086 | 11 | 7 | 0.158 |
| Onset to ED | 616.75 | 592.8 | 0.045 | 603.45 | 596.49 | 0.013 |
| Onset to reperfusion | 775.05 | 781.57 | –0.012 | 785.99 | 767.62 | 0.034 |
| Final TICI | 80 | 92 | –0.348 | 85 | 88 | –0.087 |
ASPECTS, Alberta Stroke Program Early CT Score; ED, emergency department; ICA, Internal Carotid Artery; TICI, thrombolysis in cerebral ischaemia.