Table 5.

Analysis of correlation between the fraction of the last 15 min of isoflurane exposure spent in EEG suppression and the degree of impairment in cognitive performance upon emergence. As with the measure of total duration of suppression, suppression in the last 15 min of anaesthetic exposure was not significantly correlated to initial cognitive task performance at emergence. DSST, digit symbol substitution test; PVT, psychomotor vigilance test.

Association between EEG suppression in the last 15 min and cognitive performance
	Spearman's Rho	P-value
DSST reaction time	−0.1656	0.409
DSST accuracy	−0.0165	0.9351
PVT reaction time	0.2754	0.1645
PVT accuracy	0.3007	0.1275