Culley DJ, et al. - This research explored the proposition that unrecognized cognitive impairment in patients without a history of dementia served as a risk factor for the development of postoperative complications. Based on the findings, it was determined that several older elective orthopedic surgical patients displayed probable cognitive impairment preoperatively. Such impairment appeared to be related to the development of delirium postoperatively, a longer hospital stay, and a lower tendency of going home upon hospital discharge.