Figure 1From: Sleep-disordered breathing is a risk factor for delirium after cardiac surgery: a prospective cohort studyReceiver operating characteristic (ROC) curve of the apnea-hypopnea index of predictability for postoperative delirium. The area under the curve (AUC) was 0.712 (confidence interval: 0.604 to 0.82) with a cutoff value of 19 (sensitivity 71%, specificity 73%).Back to article page