Clinical and epidemiological differences in functional dyspepsia between the East and the West.

Functional dyspepsia (FD) is a common condition, affecting adults in both Western (North America and Europe) and Eastern (Asian) parts of the globe. The prevalence has been reported to range from 5% to 40%, largely due to variation from definition criteria and geographical location. Recent published reports in Western and Eastern populations separately indicate that differences in the epidemiology and clinical patterns of FD may exist. Such differences will have implications for the clinical management of and healthcare strategizing for FD at the local level.This review aims to examine the prevalence and clinical patterns of FD in specific groups, namely Western and Eastern populations, based on the Rome criteria. Further differences in the epidemiological associations of FD will be explored between population-based studies in both the East and the West. Finally, the socio-economic consequences of FD, an important measure of the impact of the disease, will be compared between the East and the West.