Fig. 2From: Epidemiology, validation, and clinical characteristics of inflammatory bowel disease: the ABIS birth cohort studyAge-specific incidence of register-based diagnosis of inflammatory bowel disease (IBD), Crohn's disease (CD), and ulcerative colitis (UC). Events per age are reported below the x-axis. Our IBD definition required at least of two diagnostic codes for IBD. Hence, the incidence may have been underestimated during the end of the study periodBack to article page