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Abstract Background Cardiovascular risk factors are prognostic factors in coronavirus disease 2019 (COVID-19) and have been scarcely studied in Brazil. Objective The aim of this study was to assess the impact of cardiovascular risk factors on the outcomes of patients admitted for COVID-19. Methods From July 2020 to February 2021, 200 patients from two public hospitals were enrolled. Patients were included if they had typical symptoms or signs of COVID-19, a positive real-time polymerase chain reaction test (RT-PCR) for COVID-19, and an age above 18 years. This is a prospective, observational, and longitudinal study. Data were collected within 24 h of admission. The primary endpoint was a combination of hospital lethality, mechanical ventilation, hemodialysis, or length of hospital stay >28 days. Continuous variables were compared with the Student’s t-test for independent samples or the Mann-Whitney test. For comparisons of proportions, the χ 2 test was applied. ROC curves and survival curves were constructed. Multivariate logistic regression was performed to identify independent predictors of events. The level of significance was 0.05. Results There were 98 (49%) events during the hospital course, and 72 (36%) died in the hospital. Patients with a primary endpoint were older and more likely to have a history of hypertension, diabetes, chronic obstructive pulmonary disease (COPD), and chronic kidney disease (CKD). Vital signs at admission associated with events were diastolic blood pressure, respiratory rate, and oxygen saturation in ambient air (O 2 Sat). Serum creatinine >1.37 mg/dL at admission had a sensitivity of 51.6 and a specificity of 82% to predict the primary endpoint, with an area under the curve (AUC) of 0.68. In multivariate analysis, age, diabetes, CKD, and COPD were independent predictors of the primary endpoint. Age and CKD were independent predictors of in-hospital lethality. Conclusion Cardiovascular risk factors, such as diabetes and CKD, were related to a worse prognosis in patients hospitalized with COVID-19 in this sample from two public hospitals in the state of Rio de Janeiro. 201 COVID19 COVID 19 (COVID-19 Brazil COVID19. 19. 202 2021 20 enrolled COVID19, 19, realtime real time RTPCR RT PCR (RT-PCR 1 years prospective observational lethality ventilation hemodialysis 28 >2 days Students Student s ttest t MannWhitney Mann Whitney proportions applied constructed 005 0 05 0.05 9 49% 49 (49% course 7 36% 36 (36% hypertension COPD, , (COPD) CKD. . (CKD) pressure rate O Sat. Sat Sat) 137 37 >1.3 mgdL mg dL 516 51 6 51. 82 AUC (AUC 068 68 0.68 analysis inhospital COVID-1 Janeiro COVID1 (COVID-1 > 00 0.0 4 (49 3 (36 (COPD (CKD 13 >1. 5 8 06 0.6 COVID- (COVID- 0. (4 (3 >1 (COVID (