Table 4: Bivariate analysis of socio-demographic characteristics of the patients, person in charge of intubation, anesthetist experience and POST (n=336).

Variable

                                                         POST

No (%)                                                Yes (%)                                        RR (95% CI)

Age

18 to 40 years

41 to 60 years

≥61 years

121(72.5)

69(67.0)

43(65.2)

46(27.5)

34(33.0)

23(34.8)

Referent

1.20 (0.83-1.73)

1.27 (0.84-1.91)

Gender

Female

Male

127(67.2)

106 (72.1)

62(32.8)

41(27.9)

Referent

0.85 (0.61-1.18)

Body weight, Kg

25.01 - 70.00 

  70.01 - 90.00

229(72.0)

4(22.2)

89(28.0)

14(77.8)

Referent

2.78 (2.05-3.76)***

Height, Cm

130 – 150

151 - 170 

171 - 190 

26(70.3)

157(67.1)

50(76.9)

11(29.7)

77(32.9)

15(23.1)

Referent

1.11 (0.65-1.87)

0.78 (0.40-1.51)

BMI

Severe malnutrition

Normal

Over weight

37(69.8)

178(70.6)

18(58.1)

16(30.2)

74(29.4)

13(41.9)

Referent

0.97 (0.62-1.530)

0.83 (0.78-2.49)

Smoking Status

No

Yes

227(70.9)

6(37.5)

93(29.1)

10(62.5)

Referent

2.15 (1.42-3.26)**

Intubating Person

 

Regular Anesthetists

 

Students

 

 

               208 (70.7)

     

                25(59.5)

               

 

86(29.3)

 

17(40.5)

                                                          Referent

 

0.72 (0.48-1.09)

Anesthesia Experience

< 2 years

2 -5 years

6 - 10 years

≥ 11 years

 

42(70.0)

90(72.6)

26(74.3)

50(66.7)

 

18(30.0)

34(27.4)

9(25.7)

25(33.3)

 

Referent

1.09 (0.68-1.77)

1.17 (0.59-2.31)

0.90 (0.55-1.49)

Type of Surgery

  Gynecology

  Orthopedics

  Thyroid 

  Abdominal 

  ENT

 *Others 

 

                 49(66.2)

35(76.1)

6(54.5)

106(73.6)

17(65.4)

                19(55.9)

25(33.8)

11(23.9)

5(45.5)

38(26.4)

9(34.6)

15(44.1)

Referent

0.71(0.39-1.30)

1.35(0.65-2.77)

0.78(0.51-1.19)

1.14(0.55-1.90)

1.31(0.80-2.14)

 

 

**p-value< 0.01, ***p-value< 0.001, ∞Anesthetists experience was analyzed only for the regular anesthetists (N=294), *Neurosurgery (n=16), Burn (n=14), and Uro-surgery (n=4)