AAPC, Average Annual Percent Change; AC, Acre; AL, Alagoas; AM, Amazonas; AP, Amapá; BA, Bahia; Brazil; CAAE, Certificate of Presentation for Ethical Appreciation; CD, Crohn's disease; CE, Ceará; CI, confidence intervals; Crohn's disease; DATASUS, Department of Health Informatics/Ministry of Health; DF, Distrito federal; ES, Espírito Santo; Epidemiology; GO, Goiás; IBD, Inflammatory Bowel Diseases; IBDU, Inflammatory Bowel Diseases undetermined; IBGE, National Institute of Geographics and Statistics (Instituto Brasileiro de Geografia e Estatística); ICD-10, Classification of Diseases and Related Health Problems, Tenth Revision; Incidence; Inflammatory bowel disease; MA, Maranhão; MG, Minas Gerais; MS, Mato Grosso do Sul; MT, Mato Grosso; PA, Pará; PB, Paraíba; PE, Pernambuco; PI, Piauí; PR, Paraná; Prevalence; RN, Rio Grande do Norte; RO, Rondônia; RR, Roraima; RS, Rio Grande do Sul; SC, Santa Catarina; SE, Sergipe; SP, São Paulo; SUS, national public health system (Sistema Único de Saúde); TO, Tocantins; UC, ulcerative colitis; UNOESC, University of the West of Santa Catarina; Ulcerative colitis