Table 2 Diagnostic performance of endoscopic findings for diagnosis of H. pylori status by WLI or LCI
Diagnostic performance to predict  H. pylori-positive status | ||||||
Findings on each endoscopic mode | Sensitivity | Specificity | PPV | NPV | Accuracy | |
Mucosal edema | on WLI | 75% | 78.3% | 69.8% | 82.5% | 77% |
| Â | on LCI | 80% | 80% | 72.7% | 85.7% | 80% |
Diffuse redness | on WLI | 57.5% | 90% | 79.3% | 76.1% | 77% |
| Â | on LCI | 75% | 90% | 83.3% | 84.4% | 84% |
Spotty redness | on WLI | 35% | 95% | 82.4% | 68.7% | 71% |
| Â | on LCI | 55% | 95% | 88% | 76% | 79% |
Sticky mucus | on WLI | 12.5% | 98.3% | 83.3% | 62.8% | 64% |
| Â | on LCI | 10% | 98.3% | 80% | 62.1% | 63% |
Enlarged gastric folds | on WLI | 12.5% | 100% | 100% | 63.2% | 65% |
| Â | on LCI | 12.5% | 100% | 100% | 63.2% | 65% |
Antral nodularity | on WLI | 10% | 100% | 100% | 62.5% | 64% |
| Â | on LCI | 12.5% | 100% | 100% | 63.2% | 65% |
Gastric xanthoma | on WLI | 2.5% | 98.3% | 50% | 60.2% | 60% |
| Â | on LCI | 2.5% | 96.7% | 33.3% | 59.8% | 59% |
Hyperplastic polyp | on WLI | 0% | 98.3% | 0% | 59.6% | 59% |
| Â | on LCI | 0% | 98.3% | 0% | 59.6% | 59% |
Diagnostic performance to predict H. pylori-negative status | ||||||
Findings on each endoscopic mode | Sensitivity | Specificity | PPV | NPV | Accuracy | |
Presence of RAC | on WLI | 86.7% | 95% | 96.3% | 82.6% | 90% |
| Â | on LCI | 83.3% | 85% | 89.3% | 77.3% | 84% |
Fundic gland polyps | on WLI | 16.7% | 100% | 100% | 55.6% | 50% |
| Â | on LCI | 16.7% | 100% | 100% | 55.6% | 50% |
Hematin spots | on WLI | 15% | 97.5% | 90% | 56.7% | 48% |
| Â | on LCI | 16.7% | 97.5% | 90.9% | 43.8% | 51% |
Red streak | on WLI | 8.3% | 100% | 100% | 42.1% | 45% |
| Â | on LCI | 8.3% | 100% | 100% | 42.1% | 45% |