Effects of <i>Helicobacter pylori</i> treatment and vitamin and garlic supplementation on gastric cancer incidence and mortality: follow-up of a randomized intervention trial.

Although tests for heterogeneity were only marginally significant for vitamin supplementation, the data suggest a greater preventive effect for those with favorable baseline histology (normal, superficial gastritis, chronic atrophic gastritis) and those younger than 45 years, for both gastric cancer incidence and mortality ( fig 4 ).

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