Use of renin-angiotensin system inhibitors and clinical predictors of COVID-19 severity in a tertiary hospital in the city of Buenos Aires.

Information regarding predictors of a worse COVID-19 prognosis in the South American population is scarce. We aimed to determine whether the blockade of the renin-angiotensin system is associated with a worse clinical course of COVID-19, and to evaluate what clinical variables are associated with COVID severity in our population. We included adult subjects with rtPCR-confirmed COVID-19. The use of renin system inhibitors was defined according to its registration in the electronic medical record or the hospital pharmacy registry during the previous three months. Our endpoint was a composite of death or mechanical ventilation requirement. Patients were followed up until discharge or death. A multiple logistic regression model was used to determine the predictors of the composite endpoint. In all, we included 4930 COVID+ patients, the median age was 52 years, and 48.1% were male. The endpoint occurred in 488 patients (9.9%). In adjusted analysis, neither angiotensin converting enzyme inhibitors nor angiotensin receptor blockers were associated with the outcome. Independent predictors of mortality and/or mechanical ventilation requirement were age, male sex, a history of diabetes and/or chronic kidney disease, smoking and dementia. To conclude, renin system inhibitors seem to be unrelated to COVID-19 severity, whereas prognosis is independently associated with age, male sex and comorbidities.