Table 3. Association Between Outcome and Prehospital Timea.
| Death by Type | Odds Ratio by Generalized Linear Mixed Model (95% CI)b | P Value |
|---|---|---|
| Univariable Analysis | ||
| Overall death | 1.09 (1.07-1.11) | <.001 |
| Death attributable to head injury | 1.09 (1.06-1.11) | <.001 |
| Death attributable to bleeding | 1.04 (1.00-1.09) | .04 |
| Multivariable Analysis | ||
| Overall death | 1.04 (1.01-1.07) | .002 |
| Death attributable to head injury | 1.03 (1.00-1.07) | .15 |
| Death attributable to bleeding | 1.00 (0.99-1.02) | .24 |
a
Generalized linear model with random effect by registry and emergency medical system; adjustment for individual confounders as logarithmic function (prehospital time, age, systolic blood pressure, Injury Severity Score, and Glasgow Coma Scale score).
b
Odds ratio for increase of 10 minutes in prehospital time.