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The association of coagulopathy with liver dysfunction in patients with COVID-19.

AIM: Liver dysfunction is sometimes observed in patients with coronavirus disease 2019 (COVID-19), but most of studies are from China and the frequency in other countries is unclear. In addition, previous studies suggested several mechanisms of liver damage but precise or additional mechanisms are not clearly elucidated. Therefore, we examined COVID-19 patients to explore the proportion of patients with liver dysfunction and also the factors associated with liver dysfunction.

METHODS: We retrospectively examined sixty COVID-19 patients hospitalized in our hospital. Patients who presented 40 or higher levels of alanine aminotransferase (ALT) at least once during the hospitalization were defined as high-ALT patients, and the others as normal-ALT patients. The worst values of physical and laboratory findings during the hospitalization in each case were extracted for the analyses. Univariable and multivariable logistic regression models with bootstrap (for 1000 times) were conducted.

RESULTS: Among 60 patients, there were thirty-one (52%) high-ALT patients. The high-ALT patients were obese and had significantly higher levels of D-dimer and fibrin/fibrinogen degradation products as well as white blood cell (WBC) count and levels of C-reactive protein, ferritin, and fibrinogen. Multivariable analysis revealed D-dimer and WBC as independent factors.

CONCLUSION: Considering that higher D-dimer level and WBC count were independently associated with ALT elevation, liver dysfunction in COVID-19 patients might be induced by microvascular thrombosis in addition to systemic inflammation.

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