Table 1.

Characteristics of patients at baseline.

	N (%) or $\overline{\mathrm{x}}$ ±s
Men (%)	97(66.9%)
Women (%)	48(33.1%)
Age (years)	56.48 ± 10.38
Height (cm)	164.70 ± 7.60
Weight (kg)	61.86 ± 13.10
BMI (kg/m2)	22.71 ± 4.11
ASA status (%)
I	11(7.6%)
II	134(92.4%)
BIS electrode sticking position
Left forehead (%)	72(49.7%)
Right forehead (%)	73(50.3%)
Operation time (min)	198.99 ± 89.37
Anesthesia time (min)	225.89 ± 91.01