2Department of Gastroenterology, Oslo University Hospital, Oslo, Norway;
3Institute of Clinical Medicine, University of Oslo, Oslo, Norway
Correspondence: Sandre Svatun Lirhus
Department of Health Management and Health Economics, University of Oslo, Forskningsveien 3A, Harald Schjelderups Hus, Oslo, 0373, Norway
Tel +47 97 58 29 25
Background: Countries have different diagnostic procedures and treatment regimens for inflammatory bowel disease (IBD) patients. In addition to differences in population characteristics, completeness of data and health registries, different follow-up time and case definitions can have a large impact on estimates of the incidence and prevalence of IBD.
Aim: The aim of this study was to use hospital and prescription data to estimate incidence and prevalence of Crohn’s disease (CD) and ulcerative colitis (UC), using different case definitions.