Table 1. Patient Characteristics.
| Characteristic | Low-Mortality Hospitals (n = 9983) | All Other Hospitals (n = 24 708) | P Value |
|---|---|---|---|
| Age, median (IQR), y | 79 (72-84) | 79 (72-84) | .09 |
| Female, % | 40.1 | 41.1 | .11 |
| Race/ethnicity, % | |||
| White | 89.4 | 87.3 | <.01 |
| Black | 5.7 | 6.7 | |
| Hispanic | 1.7 | 1.7 | |
| Asian | 1.2 | 2.2 | |
| Other/missing | 2.0 | 2.1 | |
| Charlson Comorbidity Index, % | |||
| 0 | 46.8 | 46.7 | .91 |
| 1 | 28.7 | 28.6 | |
| 2 | 24.5 | 24.7 | |
| Injury Severity Score, % | |||
| <9 (Mild) | 0 | 0 | .19 |
| 9-15 (Moderate) | 29.5 | 29.6 | |
| 16-25 (Severe) | 52.2 | 51.3 | |
| >25 (Profound) | 18.3 | 19.1 | |
| Head AIS score, % | |||
| 3 (Serious) | 41.1 | 41.7 | <.01 |
| 4 (Severe) | 48.7 | 48.0 | |
| 5 (Critical) | 9.5 | 10.9 |
Abbreviations: AIS, Abbreviated Injury Scale; IQR, interquartile range.