Journal
WORLD JOURNAL OF GASTROENTEROLOGY
Volume 7, Issue 6, Pages 801-804Publisher
W J G PRESS
DOI: 10.3748/wjg.v7.i6.801
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AIM: To follow the principles of evidence based medicine to reach the integrated results of these studies. METHODS: Twenty-one papers of case-control studies were selected, including I I on gastric cancer, 7 on precancerous lesion of stomach and 3 on lymphoma of stomach. Meta analysis was used to sum up the odds ratios (OR) of these studies. RESULTS: H. pylori vsgastric cancer (intestinal and diffuse type): the odds ratio from the fixed effect model is 3.0016 (95% CI: 2.4197-3.7234, P < 0.001). H. pylori vs precancerous lesion of stomach: a random effect model was used to calculate the summary odds ratio and its value is 2.5635 (95% Cl: 1.8477-3.5566, P < 0.01). H. pylori vs lymphoma of stomach: though the quantity of literature is too small to make Meta analysis, the data of these 3 studies show that lymphoma of stomach is highly associated with H. pylori infections. CONCLUSION: Since it had been revealed that H. pylori infection pre-exists in gastric carcinoma and precancerous lesions, the results of Meta analysis present a strong evidence to support the conclusion that H. pylori infection is a risk factor for gastric carcinoma.
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