Survival decreased by an average of 2.27% per day for hospitalization and 3.27% per day for ICU stay. For hospitalized cases, the highest hazard mean values, with a positive correlation, were for symptoms of dyspnea (HR = 1.249 95% confidence interval, 1.225–1.273) and low oxygen saturation (HR = 1.157 95% CI 1.137–1.178). The average stay was 14.4 days for hospitalized patients and 12.4 days for ICU patients. Hazard ratios (HRs) and survival curves were calculated by age group. We performed Cox regression in two models (ICU and hospitalization times). The symptoms analyzed included: fever, dyspnea, low oxygen saturation (SpO2 < 95%), cough, respiratory distress, fatigue, sore throat, diarrhea, vomiting, loss of taste, loss of smell, and abdominal pain.
All the patients had a positive COVID-19 diagnosis. The study covered 55,563 ICU admissions and 238,075 hospitalizations in Brazilian Health System units from February 22, 2020, to June 7, 2021. In this context, the present study aimed to analyze the hospitalization and intensive care unit (ICU) times in patients diagnosed with COVID-19. The coronavirus disease (COVID-19) pandemic has overwhelmed health care systems in many countries and bed availability has become a concern.
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