Symptoms meeting the Rome IV criteria for functional dyspepsia were found in 12% of US adults and 8% of people in the UK and Canada, researchers reported in The Lancet Gastroenterology & Hepatology. The most common subtypes were postprandial distress syndrome, epigastric pain syndrome and both syndromes together. These individuals had more-impaired health and used more healthcare than their peers without dyspepsia.