. Author manuscript; available in PMC: 2014 Jun 5.

Published in final edited form as: Am J Gastroenterol. 2014 Jan 14;109(3):357–368. doi: 10.1038/ajg.2013.443

Table C2.

Assessment of additive interaction between Helicobacter pylori and corpus gastritis on BE

Variable	Estimate (s.e.)	Wald χ² (P value)^a
Unadjusted
H. pylori	–0.27 (0.12)	4.78 (0.03)
Corpus gastritis	–0.20 (0.05)	19.54 (<0.0001)
Interaction between H. pylori and corpus gastritis	0.21 (0.13)	2.67 (0.10)
Adjusted^a
H. pylori	–0.23 (0.15)	2.31 (0.13)
Corpus gastritis	–0.13 (0.05)	7.95 (0.005)
Interaction between H. pylori and corpus gastritis	0.22 (0.16)	1.89 (0.17)

BE, Barrett's esophagus.

Controlling for age and non-Hispanic white race.