There are some shortcomings in this study: (1) the patient's previous nutritional level cannot be obtained due to database limitations, thus the degree of albumin decline caused by this infection cannot be obtained, which may better reflect the severity of the patient's condition; and (2) due to the lack of a unified diagnosis and treatment standard, the concentration, dosage, and treatment timing of albumin supplementation are not recorded in the subgroup analysis. This evidence concerns the gene ALB and infection.