1. Evolving changes in mortality of 13,301 critically ill adult patients with COVID-19 over 8 months
- Author
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Leonardo S. L. Bastos, Marcio Soares, Jorge I. F. Salluh, Leila Figueiredo Dantas, Silvio Hamacher, Pedro Kurtz, Fernando G. Zampieri, and Fernando A. Bozza
- Subjects
Adult ,medicine.medical_specialty ,Original ,Critical Illness ,medicine.medical_treatment ,Critical Care and Intensive Care Medicine ,03 medical and health sciences ,0302 clinical medicine ,Anesthesiology ,Intensive care ,medicine ,Humans ,Brazil/epidemiology ,Hospital Mortality ,Pandemics ,Mechanical ventilation ,SARS-CoV-2 ,Proportional hazards model ,business.industry ,Mortality rate ,Respiratory support ,Hazard ratio ,COVID-19 ,030208 emergency & critical care medicine ,Respiration, Artificial ,Confidence interval ,Coronavirus ,In-hospital mortality ,Intensive Care Units ,030228 respiratory system ,Emergency medicine ,Cohort ,Non-invasive ventilation ,business - Abstract
Purpose Clinical characteristics and management of COVID-19 patients have evolved during the pandemic, potentially changing their outcomes. We analyzed the associations of changes in mortality rates with clinical profiles and respiratory support strategies in COVID-19 critically ill patients. Methods A multicenter cohort of RT-PCR-confirmed COVID-19 patients admitted at 126 Brazilian intensive care units between February 27th and October 28th, 2020. Assessing temporal changes in deaths, we identified distinct time periods. We evaluated the association of characteristics and respiratory support strategies with 60-day in-hospital mortality using random-effects multivariable Cox regression with inverse probability weighting. Results Among the 13,301 confirmed-COVID-19 patients, 60-day in-hospital mortality was 13%. Across four time periods identified, younger patients were progressively more common, non-invasive respiratory support was increasingly used, and the 60-day in-hospital mortality decreased in the last two periods. 4188 patients received advanced respiratory support (non-invasive or invasive), from which 42% underwent only invasive mechanical ventilation, 37% only non-invasive respiratory support and 21% failed non-invasive support and were intubated. After adjusting for organ dysfunction scores and premorbid conditions, we found that younger age, absence of frailty and the use of non-invasive respiratory support (NIRS) as first support strategy were independently associated with improved survival (hazard ratio for NIRS first [95% confidence interval], 0.59 [0.54–0.65], p
- Published
- 2021
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