Cited by 77COVID-19 epidemiological studiesCOVID-19 and healthcare impactsCOVID-19 Clinical Research Studies

Leading causes of excess mortality in Mexico during the COVID-19 pandemic 2020–2021: A death certificates study in a middle-income country

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Palacio-Mejía, Lina Sofía, Hernández-Ávila, Juan Eugenio, Hernández-Ávila, Mauricio, Dyer-Leal, Dwight, Barranco, Arturo, Quezada-Sánchez, Amado D., Alvarez-Aceves, Mariana, Cortés-Alcalá, Ricardo +10 more·2022·The Lancet Regional Health - Americas

Abstract

Background: The death toll after SARS-CoV-2 emergence includes deaths directly or indirectly associated with COVID-19. Mexico reported 325,415 excess deaths, 34.4% of them not directly related to COVID-19 in 2020. In this work, we aimed to analyse temporal changes in the distribution of the leading causes of mortality produced by COVID-19 pandemic in Mexico to understand excess mortality not directly related to the virus infection. Methods: We did a longitudinal retrospective study of the leading causes of mortality and their variation with respect to cause-specific expected deaths in Mexico from January 2020 through December 2021 using death certificate information. We fitted a Poisson regression model to predict cause-specific mortality during the pandemic period, based on the 2015-2019 registered mortality. We estimated excess deaths as a weekly difference between expected and observed deaths and added up for the entire period. We expressed all-cause and cause-specific excess mortality as a percentage change with respect to predicted deaths by our model. Findings: COVID-19 was the leading cause of death in 2020-2021 (439,582 deaths). All-cause total excess mortality was 600,590 deaths (38⋅2% [95% CI: 36·0 to 40·4] over expected). The largest increases in cause-specific mortality, occurred in diabetes (36·8% over expected), respiratory infections (33·3%), ischaemic heart diseases (32·5%) and hypertensive diseases (25·0%). The cause-groups that experienced significant decreases with respect to the expected pre-pandemic mortality were infectious and parasitic diseases (-20·8%), skin diseases (-17·5%), non-traffic related accidents (-16·7%) and malignant neoplasm (-5·3%). Interpretation: Mortality from COVID-19 became the first cause of death in 2020-2021, the increase in other causes of death may be explained by changes in the health service utilization patterns caused by hospital conversion or fear of the population using them. Cause-misclassification cannot be ruled out. Funding: This study was funded by Conacyt.

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  1. [13]OECD Excess Mortality 2021 OECD iLibrary [Internet][updated 2022; cited 2022 Mar 25]. Available from: https://www.oecd-ilibrary.org/sites/ec2de914-en/index.html?itemId=/content/component/ec2de914-en
  2. [24]World Health Organization ICD-10: International Statistical Classification of Diseases and Related Health Problems: Tenth Revision 2nd Edition 2004 World Health Organization

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Authors
Palacio-Mejía, L. S., Hernández-Ávila, J. E., Hernández-Ávila, M., Dyer-Leal, D., Barranco, A., Quezada-Sánchez, A. D., Alvarez-Aceves, M., Cortés-Alcalá, R., Fernández- Wheatley, J. L., Ordoñez-Hernández, I., Vielma-Orozco, E., Muradás-Troitiño, M. D. L. C., Muro-Orozco, O., Navarro-Luévano, E., Rodriguez-González, K., Gabastou, J. M., López-Ridaura, R., & López-Gatell, H.
Affiliations
World Health Organization Regional Office for the Americas (US)
Venue
The Lancet Regional Health - Americas
Publisher
Elsevier BV
Published
2022-09
Volume
13
Pages
100303
ISSN
2667-193X (ISSN-L)
OpenAlex
W4283392498
Cited by
77
References
42
Citations by year
2026: 6 · 2025: 13 · 2024: 18 · 2023: 29 · 2022: 7 · 2020: 1 · 2014: 1
FWCI
9.96
Type
journal article
Language
en
Open access
Locations
  • The Lancet Regional Health - Americas (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Consejo Nacional de Ciencia y Tecnología
Topics
  • Physical Sciences › Mathematics › Modeling and Simulation › COVID-19 epidemiological studies
  • Health Sciences › Medicine › Oncology › COVID-19 and healthcare impacts
  • Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
Keywords
COVID-19 pandemic, excess mortality, cause-specific mortality, indirect effects of COVID-19, death certificates, diabetes mortality, respiratory infections, ischemic heart disease, hypertension, infectious and parasitic diseases, cancer, health care utilization, Mexico

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