Skip to main content

Table 3 Predictive performances of different variables for significant hemorrhage

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

Variable AUC [IC95%] Cutoff Se (%) Spe (%) PLR (%) NLR (%) PPV (%) NPV (%) Y Gray zone (range)
Shock indexprehosp 0.71 [0.70–0.72] 1 62 83 3.6 0.5 32 94 0.45 0.1–1.2
POC-Hbprehosp (g dl−1) 0.72 [0.71–.73] 13 64 70 2.1 0.5 22 94 0.34 12– 15
FVprehosp (ml) 0.79 [0.78–0.80] 900 78 68 2.4 0.3 25 96 0.46 500–1500
Shock indexhosp 0.77 [0.76–0.78] 0.9 62 86 4.4 0.4 36 95 0.48 0.5–1
POC-Hbhosp (g dl−1) 0.88 [0.88–0.89] 11.4 78 84 4.9 0.3 40 97 0.62 11–13
DeltaPOC-Hb (g dl−1) 0.77 [0.76–0.78] − 2 70 77 3.0 0.4 29 95 0.46 − 3–0
Lactatehosp (mmol liter−1) 0.81 [0.80–0.83] 3.5 63 87 4.7 0.4 41 94 0.49 2–4
Hb-Labhosp (g dl−1) 0.92 [0.91–0.92] 11.8 88 81 4.5 0.2 37 98 0.68 11–12
  1. Shock indexprehosp = maximal HRprehosp/minimal systolic arterial BPprehosp; POC-Hbprehosp prehospital hemoglobin level provided by the point-of-care HemoCue® device; FVprehosp prehospital fluid volume infused; POC-Hbhosp hemoglobin level provided by the point-of-care HemoCue® device at hospital admission; DeltaPOC-Hb = POC-Hbhosp - POC-Hbprehosp; Hb-Labhosp hemoglobin level provided by the laboratory at hospital admission; shock indexhosp = HR at admission/systolic arterial BP at admission
  2. AUC area under the ROC curve, Se sensitivity, Spe specificity, PLR positive likelihood ratio, NLR negative likelihood ratio, POC point-of-care, PPV positive predictive value, NPV negative predictive value, Y Youden