Multivariate Analysis of the Symbol Digit Substitution Test with Interactions of <i>H. pylori</i> in US 21 to 59 Year-Olds, NHANES III (1988–1994): Unstandardized Coefficients [95% CI] from Weighted OLS Regression.

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. aCovariates that did not have significant interactions with H. pylori and CagA were included in all models but not shown. bPositive defined as Serum toxoplasmosis antibody > = 7 IU/mL. * P <.05, ** P <.01, *** P <.001. Multivariate Analysis of the Symbol Digit Substitution Test with Interactions of H. pylori in US 21 to 59 Year-Olds, NHANES III (1988–1994): Unstandardized Coefficients [95% CI] from Weighted OLS Regression.