Status of Inflammatory and Coagulation Factors in COVID-19 and Its Relation with the Disease Severity

The role of activation of inflammatory processes in the exacerbation of COVID-19 disease has been fully confirmed. In addition, the occurrence of thromboembolic events in patients with COVID-19 is expected even long after recovery from the disease. However, which factors are essentially prognostic for this disease is still not theoretically agreed upon. What we did in the present study was to evaluate the prognostic role of some inflammatory and coagulation factors in predicting the severity of COVID-19 disease. In this study, the need for ICU admission was considered as a symbol of disease severity. Forty-six cases were studied in this cross-sectional study. Patients over 18 years of age with a definitive diagnosis of COVID-19 were assessed in terms of coagulation profiles and inflammatory and cytokine markers. Regarding laboratory data, serum levels of D-dimer, protein S, protein C, FDP, and fibrinogen were measured using an automated coagulation analyzer, and serum levels of interleukin-6 were measured using the ELISA technique. In total, 21 patients (45.7%) were admitted to the ICU due to the severity of the disease. In comparing inflammatory and coagulation factors between the two groups of patients, with and without ICU admission, a significant difference was revealed between fibrinogen (P=0.023), D-dimer (P=0.047), protein C (P=0.001), and protein S level (P=0.014). The decrease in protein C level had the highest value for predicting the severity of the disease and therefore the need for ICU admission. Among various inflammatory and coagulation factors, the role of fibrinogen, D-dimer, protein C, and protein S in predicting the severe form of COVID-19 and the patient's need for ICU admission was confirmed.