Table 1 Demographic characteristics of patients

Sex (M/F)

21/19

19/21

Age (yr)

43.1 (11.3)

45.7 (11.4)

Weight (kg)

66.4 (11.8)

63.9 (10.2)

Height (cm)

165.2 (7.1)

166.2 (8.0)

Body mass index (kg•m^− 2)

24.2 (3.5)

23.1 (2.8)

ASA classification (I/II)

30/10

32/8

Operator (1/2/3)

16/13/11

14/16/10

Surgery duration (min)

89.1 (34.4)

83.3 (33.0)

Anesthesia duration (min)

103.2 (36.1)

92.5 (31.0)

Baseline BIS value

97 (1)

97 (1)