Table 3.
Individual descriptive statistics by injury severity group
| Less severe injuries ISS≤15 (n=380 218) |
More severe injuries ISS>15 (n=25 997) |
P values* | |
| Age, mean (95% CI) | 60.6 (60.6 to 60.7) | 57.0 (56.7 to 57.3) | <0.001 |
| Female (%) | 50.8 | 35.8 | |
| Race (%) | <0.001 | ||
| White | 70.4 | 64.0 | |
| Black | 25.7 | 31.1 | |
| Other | 3.9 | 4.9 | |
| Mechanism (%) | <0.001 | ||
| Falls | 44.4 | 41.7 | |
| Firearms | 2.0 | 8.1 | |
| Motor vehicle | 7.4 | 24.2 | |
| Comorbidities, mean (95% CI) | 2.8 (2.7 to 2.8) | 2.5 (2.5 to 2.5) | <0.001 |
| Mortality (%) | 2.1 | 8.2 | <0.001 |
| LOS | 4.0 (2.0, 7.0) | 6.0 (3.0, 11.0) | <0.001 |
| Charges (thousands of dollars), median (IQR) | 22.0 (12.8–37.5) | 37.2 (19.6–80.2) | <0.001 |
| Neighbourhood poverty rate, median (IQR) | 12.4 (6.5–26.5) | 13.2 (6.5–32.3) | <0.001 |
*P values for one-way analysis of variance (age), Kruskal-Wallis (LOS, cost) or χ2 (female, race, mechanism, mortality).
ISS, Injury Severity Score; LOS, length of stay.