On the other hand, the prevalence of HP (-) AG (+) showed a remarkably increasing trend with age, whereas the prevalence of HP (+) AG (-) showed a decreasing trend with age.
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Trends in the prevalence of atrophic gastritis and Helicobacter pylori infection over a 10‑year period in Japan: The ROAD study 2005‑2015.
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The sentences
Stratified for age, the prevalence of AG showed an increasing trend with age, whereas the prevalence of H. pylori infection increased with aging, except for in the elderly group, showing an inverted U-shaped association.