Early symptoms in the prodromal phase of delirium: a prospective cohort study in elderly patients undergoing hip surgery.

Objectives: The authors investigated prodromal delirium symptoms in elderly patients undergoing hip surgery.

Methods: This was a prospective cohort study in the setting of a large medical school-affiliated general hospital in Alkmaar, The Netherlands. Participants were patients undergoing hip surgery aged 70 and older at risk for delirium.