Table 2. Variability of slow wave activity saturation across the brain for induction and emergence.

Summary statistics across channel locations for induction and emergence from anesthesia in the experimental study. Slow wave activity saturation (SWAS) parameters are presented as mean ± standard deviation of seven frontal, seven parietal and five central channels for 16 healthy volunteers. After checking for normality, SWAS parameters were analyzed using two-way repeated measures ANOVA with channel location (between-region variable) and induction-versus-emergence (within-subject variable). ** denotes a significant difference between all regions (P<0.001), * between frontal region and the rest (P<0.01), and † between induction and emergence (P<0.001). Abbreviation: SWAS-RG, SWAS-response gap.

	Induction			Emergence
Cel/robr (μg/ml)	1.5± 0.7			1.4± 0.6
Channel Region	Frontal	Parietal	Central	Frontal	Parietal	Central
Successful fits (%) *	87.5	93.8	94.6	80.4	87.4	89.3
Pswas (dB) *	19.3±3.8	16.5±3.3	15.3±3.5	19.9±4.0	16.8±2.8	15.4±3.6
Ceswas (μg/ml) †	2.7±0.5	2.7±0.5	2.7±0.5	2.1±0.7	1.9±0.6	1.9±0.6
Pbaseline (dB) **†	9.1±3.2	6.3±2.5	4.1±2.5	8.6±2.6	5.4±2.0	4.0±2.1
Gradient (degrees) *†	83.0±6.0	83.9±3.0	84.1±2.5	83.4±7.5	86.2±4.0	86.6±3.3
SWAS-RG (μg/ml) |	1.2±0.5	1.1±0.3	1.2±0.5	0.7±0.6	0.5±0.5	0.5±0.5