Table 2.

The intraoperative characteristics

	BIS 50 group	BIS 35 group	P value
BIS	49.71 ± 4.1	35.60 ± 4.8	< 0.001**
MAP	91.45 ± 9.92	88.12 ± 9.21	0.114
Perioperative medications
Dexmedetomidine (mg)	83.02 ± 12.12	81.08 ± 12.00	0.463
Sufentanil (μg)	25(20–25)	20(20–25)	0.293
Propofol (mg)	965.30 ± 280.03	1114.73 ± 387.41	0.046*
Cisatracurium	20(18–20)	10(16–20)	0.258
Remifentanil (mg)	0.68 ± 0.21	0.72 ± 0.22	0.384
Use of norepinephrine n (%)	4(9.5%)	8(19.0%)	0.212
Use of nitroglycerin n (%)	1(2.4%)	0	0.314
Time, mean (min)
Anesthesia	116(103–128)	117(102–135)	0.558
Surgery	83(69–95)	79(68–100)	0.645
Infusion volume (mL)	1000(875–1200)	1000(875–1400)	0.299

BIS Bispectral Index, MAP Mean arterial pressure

*P < 0.05, **P < 0.001