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Table 3 Multivariate hurdle model of factors predicting postoperative oxygen therapy use and risk scores in children undergoing non-cardiac surgery

From: Risk prediction tool for use and predictors of duration of postoperative oxygen therapy in children undergoing non-cardiac surgery: a case-control study

Factor

Coefficient

Adjusted OR (95% CI)

p value

Risk score

Body mass index (Ref: 15-24.9)

 5–14.9

0.51

1.66 (1.07, 2.58)

0.024

1

 25-60

1.04

2.82 (1.30, 6.11)

0.009

2

Hyper-reactive airway (Ref: No)

 Yes

0.92

2.50 (1.12, 5.59)

0.025

2

Probable difficult airway (Ref: No)

 Yes

1.61

4.99 (1.74, 14.32)

0.003

3

ASA physical status (Ref: 1)

 2

0.31

1.36 (0.73, 2.53)

0.327

0

 3

1.55

4.73 (2.43, 9.18)

<0.001

3

Site/ type of procedure (Ref: Eye)

 Urologic

1.46

4.32 (1.39, 13.41)

0.01

3

 Airway

2.04

7.72 (2.62, 22.70)

0.0002

4

 Ear-nose-face

0.82

2.27 (0.60, 8.52)

0.22

0

 Thoracic

5.63

277.9 (44.56, 1733)

<0.0001

11

 Intra-abdomen

1.96

7.12 (2.30, 22.04)

0.0007

4

 Orthopedic

1.95

7.00 (2.30, 21.33)

0.0006

4

 Intra-cranial

2.01

7.45 (1.62, 34.20)

0.01

4

 Gastrointestinal scope

1.23

3.42 (0.88, 13.37)

0.07

0

 Cardiac catheterization

1.98

7.28 (2.04, 25.96)

0.002

4

Airway device (Ref: Facemask/LMA)

 Spontaneous breathing with non- rebreathing mask

1.38

3.98 (0.64, 24.88)

0.14

0

 Endotracheal tube intubation

1.89

6.64 (2.54, 17.32)

0.0001

4

Neuromuscular blocking agent (Ref: None)

 Succinylcholine

0.67

1.95 (0.92, 4.13)

0.080

0

 Aminosteroid derivatives

1.06

2.89 (1.18, 7.05)

0.02

2

 Benzylisoquinolines

0.07

1.07 (0.58, 1.96)

0.83

0

Anesthetic time (hours) (Ref: <1)

 1–2.9

1.09

2.99 (1.38, 6.44)

0.005

2

 ≥3

1.57

4.79 (1.99, 11.6)

0.0005

3

PRAE (Ref: None)

 UAO and laryngospasm

4.12

61.5 (14.4, 262)

<0.0001

8

 Desaturation

6.18

481.2 (177.9, 1302)

<0.0001

12

 Bronchospasm/wheezing

4.53

92.4 (29.7, 288)

<0.0001

9

  1. Ref Reference group; OR Odds ratio, CI Confidence interval, ASA American Society of Anesthesiologists, LMA Laryngeal mask airway, UAO Upper airway obstruction, PRAE Perioperative respiratory adverse events