The incidence and prevalence of Helicobacter pylori infection are generally higher among people born outside North America. Within North America, the prevalence of the infection is higher in certain racial and ethnic groups, and people who have immigrated to North America.<unk><unk>  disease is acquired during childhood. The incidence of<unk><unk>  disease increases with age; the median age at diagnosis is 18-30 years.<unk><unk>  disease affects both sexes equally in childhood. Men are more commonly affected by<unk><unk>  disease than women in adulthood.
Peptic ulcer epidemiology and demographics
Stomatitis epidemiology and demographics
Diverticulosis epidemiology and demographics
Gastritis epidemiology and demographics
Upper gastrointestinal bleeding epidemiology and demographics
Carcinoid syndrome epidemiology and demographics
Celiac disease epidemiology and demographics
Irritable bowel syndrome epidemiology and demographics