Excess mortality according to group of causes in the first year of the COVID-19 pandemic in Brazil.

Objective: To estimate excess mortality by cause of death in Brazil and states in 2020.

Methods: We estimated the expected number of deaths considering a linear trend analysis with the number of deaths between 2015 and 2019 for each group of causes and each federative unit. We calculated standardized mortality ratios (SMR) and 95% confidence intervals for each SMR assuming a Poisson distribution.