| A | Amoxicillin |
| AE | Adverse Event |
| B | Bismuth Salts |
| C | Clarithromycin |
| Hp-EuReg | European Registry on Helicobacter pylori Management |
| H. pylori | Helicobacter pylori |
| ITT | Intention-to-Treat |
| J | Josamycin |
| M | Metronidazole |
| mITT | Modified Intention-to-Treat |
| N | Number of Cases |
| PPI | Proton Pump Inhibitor |
| RCT | Randomised Controlled Trial |
| SD | Standard Deviation |
| Tc | Tetracycline |
| AEG | Asociación Española de Gastroenterología |
| CI | Confidence interval |
| e-CRF | Electronic case report form |
| OR | Odds ratio |
| REDCap | Research Electronic Data Capture |
| WorldHpReg | World Registry on H. pylori Management |