Investigating the relationship between cross-national suicide rates and COVID-19 first and second waves spread across the world: An exploratory study

Introduction: COVID-19 spreads between people in close contact. Social isolation, which is linked with increased suicide risk, prevents COVID-19 from spreading. Suicide and COVID-19 may therefore repre-sent two antagonistic phenomena. Specifically, we tested whether previous cross-national suicide rates inversely correlate with COVID-19 cases and deaths across countries.Material and methods: We ran unadjusted bivariate correlations between the most updated (2016) cross -national Age-Standardised suicide rates and COVID-19 cumulative cases and deaths (as of: 30/08/2020, 11/10/2020 and 30/05/2021) across countries; and we controlled for WHO Income group, WHO region, suicide data quality, and urbanicity.Results: Suicide rates negatively correlated with COVID-19 cumulative cases up to 30/08/2020 (r = -0.14, P = .064) and up to 11/10/2020 at an almost significant level (r = -0.149, P = .050) across 174 countries. As of 11/10/2020 this correlation became significant when controlling for WHO region (r = -0.17, P = .028), data quality (r =-0.181, P = .017) and urbanicity (r =-0.172, P = .039); and as of 30/08/2020 when adjusting for WHO region (r = -0.15, P = .047) and data quality a (r = -0.16, P = .036). No significant correlations between suicide rates and COVID-19 deaths were found. Conclusions: There seems to be an inverse correlation between previous cross-national suicide rates and COVID-19 cumulative cases across countries. Suicide and COVID-19 appear to behave, to some degree, as antagonistic phenomena, which challenges their prevention.(c) 2022 Sociedad Espan similar to ola de Psiquiatria y Salud Mental (SEPSM). Published by Elsevier Espana, S.L.U. All rights reserved.