A clinical prediction rule for delirium after elective noncardiac surgery

1,341 consenting patients older than 50 years admitted for major elective noncardiac surgery between November 1, 1990, and March 15, 1992 at Brigham and Women's Hospital, Boston, Mass.

Development and validation of a clinical prediction rule using 7 preoperative factors (age ≥70 years, self-reported alcohol abuse, poor cognitive status, poor functional status, markedly abnormal preoperative serum sodium, potassium, or glucose level, noncardiac thoracic surgery, and aortic aneurysm surgery)

Postoperative delirium