Extended Data Fig. 2: Annual incidence and prevalence of Crohn’s disease and ulcerative across epidemiologic stages of IBD evolution.
From: Global evolution of inflammatory bowel disease across epidemiologic stages

a, Annual incidence of Crohn’s disease categorized by three epidemiologic stages of IBD evolution as predicted by the random forest classifier. b, Annual incidence of ulcerative colitis categorized by three epidemiologic stages of IBD evolution as predicted by the random forest classifier. c, Annual prevalence of Crohn’s disease categorized by three epidemiologic stages of IBD evolution as predicted by the random forest classifier. d, Annual prevalence of ulcerative colitis categorized by three epidemiologic stages of IBD evolution as predicted by the random forest classifier. Each point corresponds to an annual aggregate mean of CD or UC incidence/prevalence for all regions with available data.