Fig. 4.

Prevalence of dysphagia in adults and children. Sample sizes (n) are shown to the right of each bar. Please note that the denominators of at risk populations from the studies presented in this figure may have different definitions, i.e. some populations may be highly symptomatic or selected. ^†Diagnostic criteria based on esophageal dysfunction or esophageal eosinophilia. ^‡Diagnostic criteria based on eosinophil count per high-power field. ^§Diagnostic criteria based on 2007 guidelines.^2¶Diagnostic criteria based on SNOMED-CT diagnosis; no diagnostic codes were reported for any other study. ^††Data refer to dysphagia or food impaction. SNOMED-CT, Systematized Nomenclature of Medicine—Clinical Terms.