Coagulation function: The prothrombin time (PT) (15.2 s vs. 13.9 s) and activated partial thromboplastin time (APTT) (39.7 s vs. 38.1 s) were significantly longer in COVID-19 patients with AKI than in those without AKI, and D-dimer (3.7 μg/mL vs. 1.4 μg/mL) levels were significantly higher in patients with AKI (Table 2). This evidence concerns the gene F2 and COVID-19.