Methodological Aspects of Brumadinho Health Project. Rev Bras Epidemiol. 2022; 25:E220002.supl.2 1 https://doi.org/10.1590/1980-549720220002.supl.2 Revista Brasileira de Epidemiologia www.scielo.br/rbepid Brumadinho Health Project: methodological aspects and epidemiological profle of participants in the cohort baseline Projeto Saúde Brumadinho: aspectos metodológicos e perfl epidemiológico dos participantes da linha de base da coorte Sérgio Viana Peixoto I,II , Josélia Oliveira Araújo Firmo I , Carmen Ildes Rodrigues Fróes-Asmus III , Juliana Vaz de Melo Mambrini I , Carlos Machado de Freitas IV , Maria Fernanda Lima-Costa I,V , Paulo Roberto Borges de Souza Júnior VI I Fundação Oswaldo Cruz, René Rachou Institute – Belo Horizonte (MG), Brazil. II Universidade Federal de Minas Gerais, Nursing School – Belo Horizonte (MG), Brazil. III Universidade Federal do Rio de Janeiro, Medical School – Rio de Janeiro (RJ), Brazil. IV Fundação Oswaldo Cruz, National School of Public Health Sérgio Arouca – Rio de Janeiro (RJ), Brazil. V Universidade Federal de Minas Gerais, Medical School – Belo Horizonte (MG), Brazil. VI Fundação Oswaldo Cruz, Institute of Communication and Scientifc and Technological Information in Health – Rio de Janeiro (RJ), Brazil. ORIGINAL ARTICLE ABSTRACT Objective: To present the methodological aspects of the Brumadinho Health Project and to describe the epidemiological profle of participants in the baseline cohort. Methods: Prospective, population-based cohort study in a representative sample of residents (aged 12 and over) of Brumadinho, Minas Gerais, after a mining tailings dam failure. Information for the baseline was collected in 2021, two years after the mining tailings dam collapsed, including sociodemographic, health and service use aspects, among others. Prevalence estimates of health outcomes were described in Brumadinho, as well as in the Metropolitan Region of Belo Horizonte and Minas Gerais, using data from the 2019 National Health Survey. All analyses were performed in the software Stata 17.0, considering the sampling weights and design efect. Results: 3,080 (86.4%) residents participated in the study, most of them being females (56.7%) and with a mean age of 46.1 years. The diseases more frequently reported were arterial hypertension (30.1%), high cholesterol (23.1%) and depression (22.5%), similarly to what was observed in the Metropolitan Region of Belo Horizonte and Minas Gerais, although the prevalence in Brumadinho was higher. At least one medical appointment and one hospitalization occurred in 75.2% and 9.4% of residents in the past year, respectively. Conclusion: It is important to monitor health, physical and mental conditions of residents after the occurrence of a disaster of this magnitude. This information can contribute with risk management of these processes, not only in the afected municipality, but also in other areas where populations are at risk of major disasters. Keywords: Epidemiology of disasters. Cohort studies. Health profle. Health efects of disasters. CORRESPONDING AUTHOR: Sérgio Viana Peixoto. Avenida Augusto de Lima, 1.715, Barro Preto, CEP: 30190-009, Belo Horizonte (MG), Brasil. E-mail: sergio.peixoto@focruz.br CONFLICT OF INTERESTS: nothing to declare. HOW TO CITE THIS ARTICLE: Peixoto SV, Firmo JOA, Fróes-Asmus CIR, Mambrini JVM, Freitas CM, Lima-Costa MF, et al. Brumadinho Health Project: methodological aspects and epidemiological profle of participants in the cohort baseline. Rev Bras Epidemiol. 2022; 25:e220002.supl.2. https://doi.org/10.1590/1980-549720220002.supl.2 This is an open article distributed under the CC-BY 4.0 license, which allows copying and redistribution of the material in any format and for any purpose as long as the original authorship and publication credits are maintained. Received on: 07/04/2022 Reviewed on: 07/18/2022 Accepted on: 07/18/2022