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Objective:To evaluate effects of diagnostic tests for Helicobacter pylori（H.pylori）infec- tion.Methods:A meta-analysis was conducted in 22 identified studies through Chinese literature searching which were published after 1995 and evaluated diagnostic tests for Helicobacter pylori（H.pylori）infec- tion.Results:Polymerase chain reaction（PCR）had the best performance with diagnostic odds ratio （DOR）of 6.7（5.5-7.8）

followed by

13

C urea breath test and Enzyme-linked immunosorbent assay （ELISA）quantitative serological test

with DOR being 6.4（5.4-7.4）and 4.5（3.8-5.2）

respectively. Conclusion:Non-invasive tests are the appropriate methods for screening H.pylori infection

whereas in- vasive tests are the best methods for ascertaining the suspected patients.