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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