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. 2022 Apr 29;14:591–600. doi: 10.2147/CLEP.S358031

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© 2022 Mouratidou et al.

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Notes: ^The Swedish National Patient Register includes all hospitalizations and outpatient visits in non-primary care in Sweden. *All children living in Sweden 2002–2014 (according to Statistics Sweden [www.scb.se]) and who had never had a diagnostic listing of IBD. In this group, the prevalence of IBD can be expected to be extremely low. Certainly, below the prevalence of diagnosed PIBD (ie, 0.08% in Sweden [Ludvigsson et al, BMC Gastroenterology 2017]). **“Suspected incident PIBD” defined as at least one (1) first ever diagnostic code of IBD (K50, K51, K52.3) before the 18th birthday, at any point 2002–2014. ^^Random sample of “Suspected incident PIBD”. The sampling is done within the Swedish National Patient Register. ¤Fulfilled the Copenhagen criteria, based on a combination of clinical, laboratory, endoscopic and histologic criteria. ^#Proportion of non-IBD patients despite having 2 diagnostic codes.

Abbreviation: PIBD, Pediatric Inflammatory Bowel Disease.