Variable

n (%)

OR (CI)

AOR

95% CI

P-value

Preop analgesia

No

28 (34.6)

1

1

Yes

23 (54.8)

2.29 (1.07 - 4.90)

2.66

1.15 - 6.12

0.02

Type of surgery

Maxillofacial/dental

4(25.0)

1

1

Abdominal

25 (51.0)

3.13 (0.88 - 11.05)

4.21

1.12 - 15.88

0.03

Thoracic

11(64.7)

5.50 (1.219 - 24.81)

7.42

1.54 - 35.88

0.01

Obs/gyn

5 (31.2)

1.36 (0.29 - 6.42)

1.67

0.34 - 8.24

0.53

Other

6(24.0)

0.95 (0.22 - 4.07)

1.44

0.30 - 6.34

0.68

Duration of surgery

≤180 mins

22 (32.8)

1

1

≥181 mins

29 (51.8)

2.19 (1.06 - 4.57)

1.81

0.80 - 4.11

0.15