Mortality.

a Time of mortality assessment is not explicitly mentioned. However, we strongly assume that it is hospital mortality because no follow-up beyond hospital discharge is reported. For the studies by Davis and colleagues, this assumption is further underlined by the fact that other studies that have been performed by the same study group in the same patient population also regularly report hospital mortality. Requests to the authors to clarify this issue have remained unanswered.
b Personal communication by the first author.
c Calculated from reported percentages. May not necessarily be exactly the actual number due to rounding or unreported omission of patients from the analysis.
d Calculation of the adjusted odds ratio may not necessarily be based on the same number of patients used for calculation of the unadjusted OR (e.g., due to missing covariates in some patients).
(H-)AIS: (head) abbreviated injury scale
CI: confidence interval
ED: emergency department
EMS: emergency medical services
GCS: Glasgow Coma Scale
ICU: intensive care unit
ISS: injury severity scale
NA: not applicable
NR: not reported
OR: odds ratio
SBP: systolic blood pressure
TBI: traumatic brain injury
Mortality.