ALB and delirium: In the univariate analysis, factors with a p-value of less than 0.25, including sex [male], acetaminophen intravenous dose (≥ 1,000 mg/administration), history of neurodegenerative diseases/dementia, history of delirium, sensory impairments (vision/hearing), serum albumin (≤ 3.5 g/dL), and serum bilirubin (≥ 2.0 mg/dL), were selected as variables for the multivariate logistic regression analysis.