Table 1 Background factors and those related to operation and anaesthesia

Female [n (%)]

20 (50)

20 (50)

0.87

Age [mean (SD)]

34 (10.7)

33 (11.7)

0.76

Weight [mean (SD)]

67 (18.1)

68 (13.0)

0.87

BMI [mean (SD)]

23 (3.3)

22 (3.4)

0.76

Surgery duration [mean (SD)]

3.8 (1.4)

3.7 (1.4)

0.87

ASA Physical status [n(%)]

 I

32 (80)

31 (77)

0.07

 II

8 (20)

9 (23)

Motion sickness [n (%)]

6 (15)

7 (17.5)

0.09

PONV history [n (%)]

3 (7.5)

4 (10)

0.15

Non-smocking [n (%)]

31 (77.5)

30 (75)

0.06

Amount of fentanyl (mcg) prescribed during surgery[mean (SD)]

211 (61)

222 (60)

0.41