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) |