Fig 1.
Flowchart showing results of literature search and study inclusion.
Table 1.
Characteristics of included studies.
Table 2.
Pooled prevalence of functional abdominal pain disorders according to criteria used to define its presence, validation status of questionnaire, child/parental report, subtypes of AP-FDIG and geographical location.
Fig 2.
Geographic distribution of functional abdominal pain in children, presented in pooled-prevalence rates.