Mortality by cause of death in Brazil: effects of the COVID-19 pandemic and contribution to changes in life expectancy at birth
Fernandes, F.; Turra, C. M.; Franca, G. V. A.; Castro, M. C.
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We investigate the consequences of the COVID-19 pandemic on other underlying causes of death in Brazil in 2020 and 2021. We estimate monthly age-standardized mortality rates for 2010-2021 and decompose those time series into three additive components: trend, seasonality, and remainder. Given the long-term trend and historical seasonal fluctuations, we assume that any impact from the pandemic will be left on the remainder. We also decompose the contributions of COVID-19 deaths (direct effect) and those from other causes (indirect effects) to the annual change in life expectancy at birth (0) from 2017 to 2021. Broadly, the remainder mirrors the trajectory of pandemic waves. The impact of the COVID-19 pandemic on other causes of death was not limited to increases but also decreases. The direct effects of the pandemic reduced 0 by 1.89 years between 2019 and 2020 and 1.77 between 2020 and 2021. Indirect effects increased 0 by 0.44 between 2019 and 2020 and had virtually no impact on 0 between 2020 and 2021. Whether trajectories in mortality rates and annual gains in 0 will quickly return to pre-pandemic levels depends on governmental actions to mitigate the consequences of the COVID-19 pandemic.
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