INTRODUCTION:

Suicide is one of the main causes of death classified as violent and preventable. The objective was to estimate the incidence and mode of suicide in the 2009-2020 historical series, considering year 2020 as COVID-19 pandemic context.

METHODS:

A cross-sectional, retrospective, observational, historical timeline study was conducted. Data were obtained from the Department of Health Statistics and Information of the Ministry of Health of the Province of Buenos Aires. They were classified according to three modes of suicide: intervention of an invasive agent, an external agent or no agent. In order to evaluate the possible variation of population density on suicide incidence rates, deaths were distributed based on the population size of residence. Finally, two indices were obtained: the p-score and the estimate of observed mortality (OM).

RESULTS:

During 2009-2020 there were 13221 deaths due to self-inflicted injuries, with an average of 1110 suicides per year. When comparing the year 2020 (916 suicides) with the previous five-year period (2015-2019, with a mean of 1139 suicides ±26 in its standard error), the p-score showed a reduction of 23.1% (275 deaths less than expected) and OM, a decrease of 19.6% (223 deaths below the expected upper interval).

DISCUSSION:

During 2020 there was a reduction in the absolute and relative incidence of suicides, while maintaining the difference according to mode and gender observed through the historical timeline.

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