Hazard rate of Alzheimer’s disease mortality by H. pylori seropositivity status from fully adjusted Cox PH models among (A) Men, (B) Women: NHANES III, phase 1 and NHANES 1999–00 (pooled sample). Analysis time is expressed in months. Smoothed hazard functions are obtained from the fully adjusted model (model 3) among men and women. Abbreviations: H. pylori, Helicobacter pylori; Hp IgG–, H. pylori negative; Hp IgG+, H. pylori positive; NHANES, National Health and Nutrition Examination Surveys; PH, proportional hazards; IgG, Immunoglobulin G.