Table 4.

BIS values, HR and MAP at each time point in group B and group S ($\overline{x}$±s).

Time/	BIS		HR		MAP
	B (n = 188)	S (n = 187)	B (n = 188)	S (n = 187)	B (n = 188)	S (n = 187)
T1	93 ± 5	94 ± 4	167 ± 21	157 ± 21	81 ± 16	88 ± 11
T2	47 ± 14	45 ± 15	120 ± 26	126 ± 17	66 ± 11	71 ± 14
T3	55 ± 12	56 ± 14	112 ± 17	117 ± 19	65 ± 12	65 ± 10
T4	57 ± 8	61 ± 8	111 ± 13	114 ± 22	61 ± 12	69 ± 11
T5	52 ± 7 a	57 ± 9	102 ± 11	104 ± 15	59 ± 13a	71 ± 12
T6	54 ± 7a	57 ± 9	97 ± 10	101 ± 13	55 ± 10a	70 ± 9
T7	57 ± 6a	60 ± 8	92 ± 10	100 ± 17	53 ± 9a	72 ± 14
T8	74 ± 4	75 ± 4	113 ± 14	119 ± 14	60 ± 11a	76 ± 13

^aP < 0.05, values of BIS, HR and MAP were compared between the group B and the group S at the same time point.

BIS, bispectral index; HR, hear rate; MAP, mean aterial pressure; T1, 1 min before induction; T2, 1 min after induction (1 min after the induction drugs were administrated); T3, immediately after intubation; T4, immediately after skin incision; T5, 30 min after the start of the operation; T6, 60 min after the start of operation; T7, immediately after drug withdrawal; T8, immediately after extubation.