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Table 2 Results of the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of each test; for the total study group and differentiated for preceding H. pylori eradication therapy or placebo

From: Assessment of Helicobacter pylorieradication in patients on NSAID treatment

Test

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

Culture

Total

82

100

100

87

Eradication

73

100

100

97

Placebo

83

100

100

62

H&E stains

Total

93

99

99

94

Eradication

93

99

93

99

Placebo

92

100

100

78

Subgroup of 68 patients

IHC stains

Total

100

95

94

100

Eradication

100

94

60

100

Placebo

100

100

100

100

H&E+IHC

Total

100

92

91

100

Eradication

100

90

50

100

Placebo

100

100

100

100

  1. H&E: hematoxylin and eosin, IHC: immunohistochemistry.