Clinical Research Directory

Inclusion: * Patients 60 years old and older, * Competent to provide informed consent * Undergoing major elective surgery that requires a minimum stay of 2 days postoperatively (e.g., open cardiac surgery, open thoracic surgery, major vascular surgery, intra-abdominal surgery, open gynecologic surgery, open urologic surgery, major orthopedic surgery, open hepato-biliary surgery and major ear, nose and throat surgery) Exclusions * Neurosurgical procedures will be excluded as surgery on the brain can confound the outcome (postoperative delirium). * Patients with preoperative delirium and patients who are unable to participate adequately in delirium screening including those who are blind, deaf, or illiterate or fluent in languages other than English.