Table 2.

Evaluation of Use of Blood Products and Number of Units PRBC based on Scene or Transfer Status and the Effect of SI via Regression Coefficients.

	SCENE		TRANSFER
VARIABLE╲RESPONSE	Use of Blood (Binomial Logistic)	Number of Units of PRBC (Poisson)	Use of Blood (Binomial Logistic)	Number of Units of PRBC (Poisson)
SI-EMS	2.301 **	0.7385 †	−2.724	3.771 ‡
95% CI	0.4407 – 4.162	0.2417 – 1.235	−6.791 – 1.344	1.739 – 5.802
ΔSI: SI-EMS to SI-DC	3.547 ‡	1.141 ‡	---	---
95% CI	1.766 – 5.327	0.5835 −1.698	---	---
ΔSI: SI-EMS to SI-TX	---	---	5.147 †	1.421 *
95% CI	---	---	1.809 – 8.486	−0.0031 – 2.880
ΔSI: SI-TX to SI-DC	---	---	3.241**	0.5125
95% CI	---	---	0.7332 – 5.748	−0.4780 – 1.505
Hypotension	3.500 ‡	0.394	21.67	−2.846 †
95% CI	1.695 – 5.304	−0.1010 – 0.8890	−1211 – 1224	−4.762 - −0.9299
Transport Time	0.0001	−0.0004	0.0009	−0.0002
95% CI	−0.0037 – 0.0039	−0.0026 – 0.0018	−0.0030 – 0.0048	−0.0031 – 0.0027

The significance is indicated by p-value<0.10 (*), p-value<0.05 (**), p-value <0.01 (†), p-value <0.001 (‡)

PRBC: packed red blood cells; SI: shock index, SI-EMS: emergency medical services shock index; ΔSI: change in shock index; SI-DC: shock index at definitive are center; SI-TX: shock index at transferring facility