Table 2

Predictive values of the procalcitonin serum level and the leukocyte antisedimentation rate assessment at T2 for the four cutoff values that separate the five quintiles of parameter distribution

Cutoff value

Cases below the cutoff value (n)

Sensitivity (%)

Specificity (%)

Positive predictive value (%)

Negative predictive value (%)

Positive likelihood ratio

Negative likelihood ratio

Procalcitonin (ng/ml)

0.69

7

27

9

62

14

0.3

8.1

1.23

13

68

55

75

46

1.5

0.6

2.43

20

52

83

85

50

3.1

0.6

4.43

26

30

100

100

38

>20

0.7

Leukocyte antisedimentation rate (%)

6.3

7

88

31

58

71

1.7

0.2

10.6

13

76

56

65

69

1.5

0.6

12.7

20

71

94

92

75

6.1

0.5

23.2

26

41

100

100

62

>20

0.7

Bogar et al. Critical Care 2006 10:R110   doi:10.1186/cc4992