Variables

PONV

RR

Yes

No

(95% CI)

n (%)

n (%)

History of Smoking

Yes

2 (50.0)

2 (50.0)

1.55 (0.56-4.27)

No

39 (32.2)

82 (67.8)

Referent

History of motion sickness

Yes

10 (76.9)

3 (23.1)

2.78 (1.82-4.24)^***

No

31 (27.7)

81 (72.3)

Referent

History of previous PONV

Yes

0 (0)

1 (100)

0 (-)

No

41 (33.1)

83 (66.9)

Referent

Type of surgery

Ear

1 (16.7)

5 (83.3)

0.45 (0.07-2.75)

Nose

7 (23.3)

23 (76.7)

0.63 (0.31-1.27)

Throat

33 (37.1)

56 (62.9)

Referent

ASA classification

Class I

37 (36.3)

65 (63.7)

2.09 (0.83-5.27)

Class II

4 (17.4)

19 (82.6)

Referent

Concurrent Medical Illness

Yes

3 (50)

3 (50)

1.57 (0.68-3.63)

No

38 (31.9)

81 (68.1)

Referent

Fasting time

Less or equal 12 hrs

21 (32.8)

43 (67.2)

1.00 (0.61-1.65)

More than 12 hrs

20 (32.8)

41 (67.2)

Referent

 Opioid given as pre-medication

Yes

2 (50.0)

2 (50.0)

1.55 (0.56-4.27)

No

39 (32.2)

82 (67.8)

Referent