. 2015 Jan 15;10(1):e0116874. doi: 10.1371/journal.pone.0116874

Table 5. Analysis of the Serial Digit Learning Test with Interactions of H. pylori and CagA in US 21 to 59 Year-Olds, NHANES III (1988–1994): Unstandardized Coefficients [95%CI] from Weighted OLS Regression.

		*Model 1 Interaction of H. pylori* and CagA with Gender**		*Model 2 Interaction of H. pylori* and CagA with Race**
		b	95% CI	b	95% CI
H. pylori and CagA	Neg/Neg	.000	[.000,.000]	.000	[.000,.000]
	Pos/Neg	-.700	[-1.518,.119]	-.499	[-1.205,.208]
	Pos/Pos	-.050	[-1.259,1.159]	.234	[-.627,1.095]
Gender	Male	.000	[.000,.000]	.000	[.000,.000]
	Female	-.683	[-1.410,.045]	-.282	[-.824,.260]
Race	Non-Hispanic white	.000	[.000,.000]	.000	[.000,.000]
	Non-Hispanic black	1.459^***	[.734,2.183]	.804^*	[.026,1.582]
	Hispanic	2.358^***	[1.434,3.282]	2.228^***	[1.240,3.215]
	Other	3.073^**	[1.256,4.890]	.558	[-1.347,2.463]
Interactions with H. pylori and CagA
Gender x Pos/Neg	Male	.000	[.000,.000]
	Female	1.431^*	[.222,2.640]
Gender x Pos/Pos	Male	.000	[.000,.000]
	Female	1.688	[-.681,4.057]
Race x Pos/Neg	Non-Hispanic white			.000	[.000,.000]
	Non-Hispanic black			1.343^*	[.195,2.491]
	Hispanic			.772	[-.724,2.268]
	Other			3.925^***	[1.790,6.061]
Race x Pos/Pos	Non-Hispanic white			.000	[.000,.000]
	Non-Hispanic black			1.435	[-.036,2.906]
	Hispanic			-.002	[-.986,.982]
	Other			5.403	[-.083,10.889]
Constant		12.374^***	[7.757,16.991]	12.152^***	[7.861,16.442]
R²		.30		.31

Abbreviations: CI, Confidence intervals; Neg/Neg, H. pylori negative and CagA negative; Pos/Neg, H. pylori positive and CagA positive; Pos/Pos, H. pylori positive and CagA positive. Note: Covariates that did not have significant interactions with H. pylori and CagA were included in all models but not shown. N = 1,755.

* P <.05,

** P <.01,

*** P <.001.