Distribution of variables at time of index stroke admission, stratified by race
| Black patients | White patients | Standardised mean difference score | |
| Total | 99 728 | 705 453 | – |
| Age >75 years | 51 226 (51.4) | 476 158 (67.5) | −0.333 |
| Male | 42 864 (43.0) | 320 471 (45.4) | 0.2984 |
| Smoking history | 33 382 (33.5) | 244 456 (34.7) | −0.0249 |
| Diabetes | 50 331 (50.5) | 239 688 (34.0) | 0.3387 |
| Hypertension | 54 273 (54.4) | 419 691 (59.5) | −0.1026 |
| Hyperlipidaemia | 56 923 (57.1) | 416 702 (59.1) | −0.0403 |
| Atrial fibrillation/flutter | 22 785 (22.9) | 251 014 (35.6) | −0.2828 |
| Congestive heart failure | 22 289 (22.4) | 127 343 (18.1) | 0.1072 |
| Chronic kidney disease | 39 023 (39.1) | 184 867 (26.2) | 0.2782 |
| Charlson Comorbidity Index score, mean (SD) | 4.92 (2.19) | 4.29 (2.12) | 0.2885 |
| National Institutes of Health Stroke Scale, mean (SD) | 7.9 (7.8) N=30 928 | 7.1 (7.6) N=2 31 151 | P<0.0001 |