The Role of HLA Antigens and Steroid Dose on the Course of COVID-19 of Patients After Kidney Transplantation.

Kidney transplant recipients appear to be at higher risk for critical COVID-19. Our analysis aimed to identify the possible risk factors for a severe course of the COVID-19 disease and to determine the influence of selected human leukocyte antigens (HLAs) on the course of the disease. This is a retrospective, multicenter analysis that included patients that were confirmed to be severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) positive after kidney transplantation (KT). The group of patients was divided into two subgroups according to the course of the infection, as follows: non-hospitalized and hospitalized. A total of 186 patients (men, 69.4%) with confirmed SARS-CoV-2 positivity were included in the group. The following independent risk factors for the outcome of hospitalization were identified: the age at the time of infection [odds ratio (OR) = 1.19, < 0.0001], a body mass index (BMI) >29.9 kg/m (OR = 7.21, < 0.0001), <7.5-mg prednisone dose/day (OR = 2.29, = 0.0008), and HLA-DQ2 with a protective nature (OR = 0.05, = 0.0034). Higher doses of corticosteroids (>7.5 mg/kg) in standard immunosuppressive regimes and HLA-DQ2 appear to be protective factors in our analysis.