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Performance of the rapid antigen test in bile using the rapid stool antigen test to define H. pylori-positive and H. pylori-negative groups.
| Group | Method | TP | TN | FP | FN | Kappa Index | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 196 | Rapid antigen test in bile | 47 | 135 | 0 | 14 | 0.822 | 77 | 100 | 77 | 90.6 | 92.86 |
