Postoperative Delirium in Patients Undergoing Cardiac Surgery

Establish a follow-up database for postoperative delirium in cardiac surgery patients, adopt a bidirectional cohort design to simultaneously analyze the associations between "preoperative exposure factors and postoperative delirium incidence" and "postoperative delirium and long-term adverse outcomes", and clarify the predictive factors and prognostic impacts of postoperative delirium.

Inclusion Criteria: 1. 18 years old and above 2. Patients undergoing elective cardiac surgery Exclusion Criteria: 1. Organ transplantation surgery 2. Pregnant patients 3. Diagnosed with dementia or mental illness (such as schizophrenia) before surgery