A data set containing the prevalence of Helicobacter pylori infection in preschool children according to parental history of duodenal or gastric ulcer.
Brenner
A labelled tibble with 863 rows and 2 variables:
History of duodenal or gastric ulcer, factor with levels "No" and "Yes".
Infected with Helicobacter pylori, factor with levels "No" and "Yes".