The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

Summary of Evidence ¹

Added Smoking ² as a new subsection.

Added text ³ to state that a meta-analysis of seven studies from Asia suggests that treatment of Helicobacter pylori may reduce gastric cancer risk and added statistics (cited Fuccio et al. as reference 5).

Added text ⁴ to the Study Design about randomized controlled trials of H. pylori eradication.

Added text ⁴ to the Magnitude of Effects on Health Outcomes to state that the risk of cancer may be reduced, and the effect on cancer mortality is not known.

Evidence of Benefit ⁵

Added text ⁶ to state that a meta-analysis of seven studies from Asia suggests that treatment of H. pylori may reduce gastric cancer risk and added statistics (cited Fuccio et al. as reference 16).

Added Smoking ⁷ as a new subsection.