Els van de Vijver

44 RESULTS A total number of 354 children and teenagers with chronic abdominal pain and diarrhoea were recruited into the study between September 2014 and September 2016, and 337 were included in the final analysis. In the early stages 142 patients proceeded to endoscopy, while 195 were assigned to clinical follow-up. Another 19 children from the low-risk group were referred for endoscopy at a later stage. Eventually 48% of patients in the study cohort (161 of 337) underwent endoscopy, of which 93 were diagnosed with IBD. The patient study flow is shown in Figure 2 . Chapter 3