The univariate analysis with the Mann–Whitney–U and x2 tests shows a statistically significant correlation between the development of delirium and fluid intake (p = 0.004), blood loss (p = 0.003), duration of ventilation (p = 0.019), duration of surgery (p = 0.036), and albumin levels (p = 0.039) (Figure 1). Here, ALB is linked to delirium.