Lung damage caused by SARS-CoV-2 virus over 75% (4th grade by computed tomography data, CT 4 grade) is associated with high rates of acute respiratory distress syndrome development, admission to the intensive care unit (ICU) and high rate of mortality in hospital. Staying in ICU by itself may increase the risk of death from all causes in long-term.
OBJECTIVE
To assess the long-term outcomes in patients suffered from novel coronavirus infection (COVID-19) with total lung damage (CT 4 grade) and to search for factors impacting on outcomes.
MATERIAL AND METHODS
The outcomes of 341 patients (173 (60.7%) women and 168 (39.3%) men; age median was 63 (53-71) years), who were treated in Filatov City Clinical Hospital №15 regarding 4 grade CT lung damage caused by SARS-CoV-2, were assessed after 6 and 12 months of hospital discharge, in the periods from 04.04.2020 to 01.07.2020, from 01.10.2020 to 22.01.2021 and from 15.06.2021 to 28.08.2021. The data of survived (289) and deceased (52) patients were compared by demographic parameters, comorbid pathology, clinical features of the disease obtained from the medical history in retrospective phase of the study.
RESULTS
The proportion of patients equal 84.8% (95% CI 80.5-88.4) were alive at six-month point. After 12 months, 100% of patients were alive. In most cases the mortality occurred during 45 days after hospital discharge (35 cases; 70.0% (95% CI 55.4-82.1)). The factors associated with mortality after 6 months were age, comorbidity and grade of CT at admission to the hospital.
CONCLUSION
The mortality rate after 12 months of hospital discharge was 15.2%. Increase of mortality rate during 45 days after hospital discharge and analysis of death causes demonstrate the need for post-hospital monitoring of patients with 4 grade CT, especially those with risk factors.