Table 2.

Values of surgical Pleth index and electrodermal response

	Study group	Control group	p*
	n = 32	n = 30
SPI
Before surgery before Intubation	42 ± 14	42 ± 17	0.99
after Intubation	53 ± 14†	58 ± 17†	0.23
During surgery
before sternotomy	35 ± 12	29 ± 18	0.13
during sternotomy	40 ± 15	58 ± 14†	<0.001
EDR (n (%))
responders to intubation	12 (36%)	12 (39%)	0.86
responders to sternotomy	12 (37%)	24 (81%)	<0.001

(SPI = Surgical Pleth Index; EDR = electrodermal response, means ± standard deviation).

*Comparison of study vs. control group.

^†Comparison before intervention vs. after intervention.