| Endoscopic findings | Number | Antral biopsy number (%) | |
| Negative | Positive | ||
| Normal | 3 | 3 (100) | 0 (0) |
| Antral gastritis | 59 | 3 (5.1) | 56 (94.9) |
| Duodenal ulcer | 21 | 0 (0) | 21 (100) |
| Duodenitis | 4 | 1 (25.0) | 3 (75.0) |
| GERD | 6 | 6 (100.0) | 0 (0) |
| Atrophic gastritis | 7 | 7 (100) | 0 (0) |
| Total | 100 | 20 | 80 |