i-CBT Functional Gastrointestinal Disorders in Youth: the Impact of Negative Illness Understanding and Parental Illness Worries

Inclusion Criteria

• •Child age: 8-12 years, adolescents: 13 - 17 years
• •A primary diagnosis according to the ROME-IV criteria of one of the FGID sub-types: Irritable bowel syndrome (IBS) or functional abdominal pain not-otherwise-specified (FAP-NOS)
• •The diagnosis should be documented by their regular physician in the somatic setting, and recommended routine medical investigations should be evaluated as normal or without clinical significance (include growth; blood samples including TSH, total IgA, IgA tissue transglutaminase, complete blood count, C-reactive protein analysis, liver enzymes; and fecal calprotectin)
• •Stable dosage of FGID-related medication such as laxatives, anti-diarrheal medication or pain-modulating psychopharmacological medication during the past month.