Distributions of variables at the hospital level, stratified by quartile of percentage of black acute ischaemic stroke patients treated at the hospital
| Hospital characteristic | Quartile of percentage of black acute ischaemic stroke patients treated at hospital (range) | ||||
| 1st quartile (0) | 2nd quartile (0.01%–3.6%) | 3rd quartile (3.61%–13.0%) | 4th quartile (13.01%+) | P value | |
| Number of hospitals | 964 | 694 | 830 | 830 | – |
| Urban, frequency (%) | 96 (10.0) | 259 (37.3) | 419 (50.5) | 474 (57.1) | <0.0001 |
| Teaching, frequency (%) | 64 (6.6) | 280 (40.4) | 368 (44.3) | 415 (50.0) | <0.0001 |
| Stroke certified, frequency (%) | 115 (11.9) | 298 (42.9) | 337 (40.6) | 297 (35.8) | <0.0001 |
| Neurologist at the hospital, frequency (%) | 122 (12.7) | 482 (69.5) | 557 (67.1) | 509 (61.4) | <0.0001 |
| ICU at the hospital, frequency (%) | 637 (66.1) | 687 (99.0) | 791 (95.3) | 782 (94.2) | <0.0001 |
| Multidimensional Deprivation Index, mean (SD) | 0.123 (0.062) | 0.126 (0.058) | 0.145 (0.068) | 0.189 (0.090) | <0.0001 |
| Acute ischaemic stroke cases during study period, mean (SD) | 51 (70) | 295 (244) | 295 (310) | 253 (281) | <0.0001 |
Stroke certification of the hospital was assigned as certified versus not certified based on the Joint Commission and Det Norske Veritas certification programmes. Multidimensional Deprivation Index estimates poverty with data from the United States Census American Community Survey and accounts for standard of living, education, health, economic security, housing quality and neighbourhood quality (range 0–1, with higher values denoting higher deprivation). In this table, only hospitals with at least 11 acute ischaemic stroke admissions during the study period were included.
ICU, intensive care unit.