H. pylori tests

Sensitivity

(%) (95% CI)

Specificity

(%)

(95% CI)

Positive predictive value (%) (95% CI)

Negative predictive value (%) (95% CI)

Accuracy (%)

(95% CI)

Likelihood ratio of a positive test (%) (95% CI)

Likelihood ratio of a negative test (%) (95% CI)

IgG

87 (79 - 92)

38 (23 - 55)

80 (71.1, 86.66)

50 (31.4, 68.57)

74 (65.8, 81.09)

1.39 (1.25 - 1.54)

0.35 (0.22 - 0.53)

IgA

65 (55 - 74.1)

44 (28.17 - 60.67)

77 (66.44 - 84.87)

30 (19.08 - 44.81)

60 (50.88 - 67.9)

1.15 (1.02 - 1.31)

0.79 (0.62 - 1.01)

Stool antigen

65.2 (55 - 74)

46.8 (30.87 - 63.55)

77.9 (67.46 - 85.73)

31.9 (20.4 - 46.17)

60.4 (51.69 - 68.65)

1.22 (1.07 - 1.40)

0.74 (0.60 - 0.91)