Skip to main content

Table 6 Diagnostic performance of study measurements

From: A prospective study of the sensitivity, specificity and diagnostic performance of soluble intercellular adhesion molecule 1, highly sensitive C-reactive protein, soluble E-selectin and serum amyloid A in the diagnosis of neonatal infection

Infected

 

All

Early onset

Late Onset

Preterm

Term

sICAM-1

n = 73

n = 12

n = 61

n = 62

n = 11

AUC

0.79

0.56

0.66

0.80

0.65

Optimum cut off

228 ng/ml

228 ng/ml

368 ng/ml

228 ng/ml

203 ng/ml

sensitivity

76.7%

33.3%

52.5%

82.3%

54.6%

specificity

75.6%

95%

72.2%

70.4%

82.4%

Positive predictive value

66.6%

50.3%

76.1%

68.0%

54.6%

Negative predictive value

83.6%

90.35%

47.4%

83.8%

82.4%

hsCRP

n = 72

n = 13

n = 59

n = 60

n = 12

AUC

0.73

0.74

0.64

0.73

0.78

Optimum cut off

0.4 mg/l

0.6 mg/l

0.4 mg/l

0.2 mg/l

0.4 mg/l

sensitivity

69.4%

61.5%

71.2%

75%

83.3%

specificity

70.4%

82.3%

55.6%

65.6%

63.6%

Positive predictive value

59.5%

36.3%

71.2%

61.4%

45.4%

Negative predictive value

78.6%

92.8%

55.6%

78.2%

91.3%

SAA

n = 68

n = 12

n = 56

n = 57

n = 11

AUC

0.61

0.66

0.59

0.59

0.69

Optimum cut off

1 mg/l

1 mg/l

3 mg/l

5 mg/l

1 mg/l

sensitivity

23.5%

58.3%

28.6%

24.6%

81.8%

specificity

92.8%

67.1%

91.4%

92.4%

59.4%

Positive predictive value

66.6%

21.8%

84.2%

70.0%

40.9%

Negative predictive value

66.5%

91.1%

44.5%

62.9%

90.5%

sE-selectin

n = 62

n = 12

n = 50

n = 52

n = 10

AUC

0.72

0.69

0.67

0.77

0.65

Optimum cut off

132 mg/l

161.7 mg/l

91.5 mg/l

91.5 mg/l

204 mg/l

sensitivity

54.8%

50.0%

71.2%

78.9%

50.0%

specificity

82.3%

93.9%

54.8%

67.2%

93.1%

Positive predictive value

66.6%

60.2%

71.7%

65.1%

71.3%

Negative predictive value

73.8%

91.0%

54.1%

80.4%

84.4%

  1. All infected infants: Area under curve (AUC), optimum diagnostic "cut off" level and diagnostic performance statistics derived from ROC curve analysis for each test measurement for all infected infants and subcategories defined as early/late onset symptoms, and preterm/term infants.