Objective: This article aims to assess the utility of CURB-65 in predicting 30-day mortality in adult patients hospitalized with COVID-19., Methods: This work is a cohort study conducted between March 1 and April 30, 2020 in Ecuador., Results: A total of 247 patients were included (mean age 60 ± 14 years, 70% men, overall mortality 41.3%). Patients with CURB-65 ≥ 2 had a higher mortality rate (57 vs. 17%, p < .001) that was associated with other markers of risk: advanced age, hypertension, overweight/obesity, kidney failure, hypoxemia, requirement for mechanical ventilation, or onset of respiratory distress., Conclusions: CURB-65 ≥ 2 was associated with higher 30-day mortality on the univariate (Kaplan-Meier estimator) and multivariate (Cox regression) analysis., (Copyright © 2020 Elsevier España, S.L.U. and Sociedad Española de Medicina Interna (SEMI). All rights reserved.)