Comparing patients with and without postoperative delirium (Table 2), we found that age (P = 0.010), stroke (P = 0.032), number of comorbidities (P = 0.001), admission to operating time (P = 0.000), anesthesia type (P = 0.006), blood transfusion (P = 0.034), hemoglobin (P = 0.019), and albumin (P = 0.011) differed significantly. The gene discussed is ALB; the disease is delirium.