As shown in Table 2, there were significant differences in the albumin and TSH between delirium and no delirium group(all p < 0.05), no significant differences in the hemoglobin, blood sugar, creatinine, urea nitrogen, T3, T4, FT3, FT4, PaO2 and PaCO2 were found(all p > 0.05). Here, ALB is linked to delirium.