Table 2.

Information on surgery and anaesthesia (N = 62)

	SPI group (N = 31)	Control group (N = 31)	P-value
Duration of surgery (min)	45.1 ± 14.0	45.5 ± 16.9	0.935
Duration of anaesthesia (min)	67.3 ± 18.4	66.8 ± 18.4	0.913
Bleeding volume (ml)	163.0 ± 9.2	164.1 ± 7.2	0.606
Infusion volume (ml)	696.7 ± 236.6	741.9 ± 192.3	0.413
Propofol consumption (mg)	410.0 ± 105.0	452.0 ± 121.2	0.150
Intraoperative fentanyl consumption (µg)	177.1 ± 65.9	213.5 ± 47.5	0.016*

* The difference in the total fentanyl consumption and intraoperative fentanyl consumption between the two groups was significant, P < 0.05