Figure 2From: High serum cortisol level is associated with increased risk of delirium after coronary artery bypass graft surgery: a prospective cohort studyNumber of patients whose first episode of delirious symptoms occurred during the postoperative period. Note that in 97.6% of the delirious cases (120 of 123), the initial symptom occurred within the first three days after surgery. POD, postoperative delirium.Back to article page