Characteristics

Frequency

Percent

History of Smoking

Yes

4

3.2

No

121

96.8

History of Motion sickness

Yes

13

10.4

No

112

89.6

Previous PONV

Yes

1

0.8

No

124

99.2

Types of surgery

Ear

6

4.8

Nose

30

24

Throat

39

71.2

ASA classification

Class I

102

81.6

Class II

23

18.4

Concurrent medical illness

Yes^*

6

4.8

No

119

95.2

Fasting hours

≤ 12 hours

64

51.2

> 12 hours

61

48.8

Opioid as premedication

Yes

4

3.2

No

121

96.8

Fasting time          Mean = 12.7 hrs.

SD = 3.31

Min = 4, Max = 24