Table 1

Prevalence rates (% and 95% CI) for all Rome IV defined DGBIs, IBS and FD and comparison in most relevant countries

CountryNo of participantsPercent of adult (18+) population surveyedAll DGBIs
(% and 95% CI)
Rome IV IBS
(% and 95% CI)
Rome IV FD
(% and 95% CI)
Gibraltar8883.5%N/A5.2 (3.7 to 6.6)9.9 (7.9 to 11.9)
Spain*20720.0054%†43.7 (41.6 to 45.9)4.2 (3.4 to 5.1)7.4 (6.3 to 8.5)
UK*20270.0038%†36.7 (34.6 to 38.8)4.0 (3.1 to 4.8)6.6 (5.5 to 7.6)
  • *Results reproduced with permission from The Global Epidemiology Study.3

  • †Calculations based on population estimates from https://worldpopulationreview.com/countries.

  • DGBI, disorders of gut–brain interaction; FD, functional dyspepsia; IBS, irritable bowel syndrome; N/A, not available.