conclusions in our population of elderly individuals in northern iran, h. pylori infection was not associated with cognitive impairment in this large population. results the study was performed on 1514 individuals with an average age of 69.3 ± 7.4 years. overall, 836 (55.2 %) of the participants were male. furthermore, 68.7% of the participants had normal mmse score and 75.7% were seropositive ...