Fig. 1
From: Diagnostic performance of fecal Helicobacter pylori antigen test in Uganda
Variability of positive predictive value (PPV), negative predictive value (NPPV), and accuracy of the Helicobacter pylori stool antigen test by the prevalence of Helicobacter pylori. Footnote: The vertical dotted lines are the lowest reported prevalence of Helicobacter pylori in Uganda (42% in the community) and highest (72% among patients with dyspepsia in a hospital setting)