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Fig. 3 | Annals of Intensive Care

Fig. 3

From: How useful are hemoglobin concentration and its variations to predict significant hemorrhage in the early phase of trauma? A multicentric cohort study

Fig. 3

Relationship between the Hb drop from prehospital phase to hospital admission measured by POC device (DeltaPOC-Hb = POC-Hbhosp − POC-Hbprehosp) and the prehospital fluid volume (FVprehosp) infused according to the level of bleeding (LB): significant hemorrhage (SH) or controls (CL). Multivariate linear regression without interaction term: \(\begin{array}{*{20}l} {{\text{DeltaPOC-Hb}}= - 3 + \left( { - 0.6} \right) \times {\text{FV}}_{\text{prehosp}} + \left( { - 1.6} \right) \times {\text{LB}}} \hfill \\ {{\text{FV}}_{\text{prehosp}}:\, p < 10^{ - 15} . \, {\text{ LB }}{:} \, p < 10^{ - 15} .{\text{ LB }} = \, 0\;{\text{ for}}\;{\text{CL}},{\text{ LB}} = 1\;{\text{ for}}\;{\text{SH}}.} \hfill \\ \end{array}\) Multivariate linear regression with interaction term: \(\begin{array}{*{20}l} {{\text{DeltaPOC-Hb}}= - 0.35 + \left( { - 0.5} \right) \times {\text{FV}}_{\text{prehosp}} + \left( { - 1.4} \right) \times {\text{LB}} + \left( { - 0.2} \right) \times {\text{FV}}_{\text{prehosp}} {\text{LB}}} \hfill \\ {{\text{FV}}_{\text{prehosp}}: \, p < 10^{ - 15} .{\text{ LB}}: \, p < 10^{ - 15} .{\text{ Interaction}}\;{\text{term FV}}_{\text{prehosp}} *{\text{LB:}} \, p = 0.03.} \hfill \\ {{\text{LB}} = 0\;{\text{ for}}\;{\text{ CL}},\;{\text{LB}} = 1\;{\text{ for}}\;{\text{ SH}}.} \hfill \\ \end{array}\) For the same prehospital fluid volume infused, the Hb drop from prehospital phase to hospital admission measured by POC device (DeltaPOC-Hb) was larger in patients with SH than in CL

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