Helicobacter pylori-related chronic gastritis as a risk factor for colonic neoplasms

Table 1 Studies investigating correlations between Helicobacter pylori infection and risk of colorectal neoplasm

Ref.	Country	Year of publication	Type of study design	No. of subjects	Measure of H. pylori status	Outcome	Crude OR (95%CI)	Adjusted OR (95%CI)
[20]	Taiwan	2010	Cross-sectional	9311	Urease test	Adenoma	-	1.37 (1.23-1.52)
[19]	South Korea	2012	Cross-sectional	2195	IgG	Adenoma	1.35 (1.10-1.66)	1.36 (1.10-1.68)
						Advanced adenoma	2.19 (1.40-3.42)	2.21 (1.41-3.48)
[17]	Japan	2011	Population-based	478	IgG	Adenoma	2.26 (1.44-3.55)	2.52 (1.57-4.05)
			Case-control
[18]	Germany	2012	Population-based	3381	IgG	Cancer	-	1.3 (1.14-1.50)
			Case-control		CagA	Cancer	-	1.35 (1.15-1.59)

H. pylori: Helicobacter pylori; IgG: Immunoglobulin G; CagA: Cytotoxin-associated gene A.