The Prognostic Value of Antithrombin Levels in COVID-19 Patients on Intensive Care Unit Admission
Original Research
P: 144-149
June 2024

The Prognostic Value of Antithrombin Levels in COVID-19 Patients on Intensive Care Unit Admission

J Turk Soc Intens Care 2024;22(2):144-149
No information available.
No information available
Received Date: 20.06.2023
Accepted Date: 23.08.2023



Hypercoagulopathy related to hyperinflammation may be responsible for mortality and organ failure in coronavirus disease-2019 (COVID-19) patients. Abnormal coagulation profiles were associated with poor outcomes. In this study, we aimed to evaluate the prognostic value of antithrombin (AT) levels in critically ill COVID-19 patients on the intensive care unit (ICU) admission.

Materials and Methods

Four hundred ten critically ill COVID-19 patients were retrospectively analyzed. Inflammatory and conventional coagulation parameters as well as AT activity levels were recorded on the ICU admission. The clinical outcomes of patients were analyzed.


AT levels on the ICU admission were significantly lower in non-survivors than survivors (77.9% vs. 82.5%; p=0.027). Besides AT, D-dimer values of non-survivors were significantly higher than survivors (2775 vs. 1495 µg/L; p<0.001). The cut-off levels for AT and D-dimer were 70.5% and 1585 µg/L, respectively. When AT and D-dimer were analyzed together, mortality estimation was better than only D-dimer or AT.


Low AT levels may be indicative of severe disease and mortality together with high D-dimer levels in COVID-19 patients. Diagnosing and managing AT deficiency in COVID-19 patients could be beneficial for survival. So AT level measurements should be included in the routine panel of laboratory investigation.

Keywords: Antithrombin, COVID-19, D-dimer, hypercoagulopathy, mortality


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