Intraoperative burst suppression is associated with postoperative delirium following cardiac surgery: a prospective, observational study

Table 4 Receiver operator characteristic (ROC) analysis regarding the ability of four parameters to predictor postoperative delirium

Parameter	Area under the curve	p-value	Cut-off	Sensitivity	Specificity	Positive predictive value	Negative predictive value
Burst suppression duration	0.73	0.001	47 min.	0.58	0.84	0.63	0.81
Burst suppression ratio	0.68	0.009	5%	0.23	0.89	0.50	0.71
ASYM	0.63	0.08
Age	0.61	0.10

Burst suppression values for duration and ratio were obtained from the right forehead during the period from induction of anaesthesia until the onset of cardiopulmonary bypass. No cut-off data or predictive values were calculated for the parameters age and ASYM, since the area under their curve was non-significantly (p > 0.05) different from 0.5 (diagonal line).

ISSN: 1471-2253