[Comment on the article: "Incidence of pulmonary thromboembolism in patients with COVID-19 pneumonia"]

Rev Med Inst Mex Seguro Soc. 2026 Mar 3;64(2):e6893. doi: 10.5281/zenodo.17543983.
[Article in Spanish]

Abstract
in English, Spanish

This letter to the editor presents key concepts on research designs, prevalence and incidence, as well as statistics for comparing dichotomous variables, highlighting the difference with likelihood ratio. A Chi2 exercise with the study data is included to illustrate the methodology. Finally, a brief description of the pathophysiological mechanism linking COVID-19 infection with pulmonary thromboembolism is provided.

Esta carta al editor expone conceptos clave sobre los diseños de investigación, prevalencia e incidencia, así como la estadística para comparar variables dicotómicas, 20 destacando la diferencia con la razón de verosimilitud. Se incluye un ejercicio de Chi2 con los datos del estudio para ilustrar la metodología. Finalmente, se describe brevemente el mecanismo fisiopatológico que vincula la infección por COVID-19 con la tromboembolia pulmonar.

Keywords: COVID-19; Chi-Square Distribution; Distribución de Chi-Cuadrado; Incidence; Incidencia; Prevalence; Prevalencia; Thromboembolism; Tromboembolia.

Publication types

  • English Abstract
  • Letter

MeSH terms

  • COVID-19* / complications
  • Humans
  • Incidence
  • Pulmonary Embolism* / epidemiology
  • Pulmonary Embolism* / etiology
  • Pulmonary Embolism* / virology