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Table 5 Odds ratio, sensitivity, and specificity for ED blood lactate at different concentrations to predict in-hospital mortality of NF

From: Lactate on emergency department arrival as a predictor of in-hospital mortality in necrotizing fasciitis: a retrospective study

ED lactate, mmol/l

ORa (95% CI)

P value

Sensitivity (%)

Specificity (%)

LR+

LR−

PV+

PV−

> 2.0

2.95 (2.27–8.96)

< 0.001

92

26

1.3

0.23

0.55

0.80

> 4.0

4.15 (3.72–9.32)

< 0.001

68

68

2.1

0.41

0.70

0.70

> 6.0

8.02 (6.51–15.27)

< 0.001

57

85

4.9

0.52

0.84

0.66

> 8.0

12.36 (10.54–22.01)

< 0.001

45

96

10.1

0.56

0.91

0.63

  1. CI confidence interval, LR+ likelihood ratio positive, LR− likelihood ratio negative, OR odds ratio, PV+ positive predictive value, PV− negative predictive value
  2. aOdds ratios of blood lactate at the levels above the set cutoff points