Which statement best describes the link between observational studies and H pylori?

Question

Quizplus · Accepted Answer

Observational studies have consistently shown a direct association between H pylori infection and peptic ulcer. This relationship was first identified in the 1980s through epidemiological studies, which found an increased prevalence of H pylori infection in patients with peptic ulcers compared to those without ulcers. Later, clinical trials confirmed that eradication of H pylori infection led to a significant reduction in the recurrence of peptic ulcers.

Which Statement Best Describes the Link Between Observational Studies and H