Table 3.
Sensitivity analysis of the included trials
| Analysis | n | RR (95%CI) | P value |
| High quality studies | 4 | 1.02 (0.98–1.07) | 0.25 |
| English studies | 4 | 1.02 (0.97–1.07) | 0.54 |
| Studies using omeprazole as control | 4 | 1.02 (0.98–1.07) | 0.25 |
RR: Relative risk.
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