F2 and acute kidney injury: From the table, we find that several values in the last column are higher than 15%, such as lactate, glucose, creatinine, blood urea nitrogen, prothrombin time, and partial thromboplastin time, which may show that there are positive associations between the AKI case and these features; besides, there are also some values in the last column which are lower than −15%, such as platelet, hemoglobin, hematocrit, urine, and INR, which may reflect that they are inversely associated with the AKI case.