Table 2 Anesthesia- and surgical-related risk among children who received postoperative oxygen therapy compared with those who did not

ASA physical status

<0.001^*

 1

242 (21.0)

21 (7.3)

 2

742 (64.4)

136 (47.2)

 3

168 (14.6)

131 (45.5)

Type of case

<0.001^*

 Elective

984 (85.4)

212 (73.6)

 Emergency

168 (14.6)

76 (26.4)

Site/ type of procedure

<0.001^*

 Eye

226 (19.6)

11 (3.8)

 Urologic

212 (18.4)

33 (11.5)

 Airway

187 (16.2)

66 (22.9)

 Ear-nose-face

93 (8.1)

19 (6.6)

 Thoracic

2 (0.2)

23 (8.0)

 Intra-abdomen

84 (7.3)

49 (17.0)

 Orthopedic

238 (20.7)

50 (17.4)

 Intra-cranial

14 (1.2)

9 (3.1)

 Gastrointestinal scope

53 (4.6)

13 (4.5)

 Cardiac catheterization

43 (3.7)

15 (5.2)

Choice of anesthesia

0.04^*

 GA only

948 (82.3)

252 (87.5)

 GA with epidural/caudal

151 (13.1)

31 (10.8)

 GA with peripheral nerve block

53 (4.6)

5 (1.7)

Airway device

<0.001^*

 Facemask/laryngeal mask airway

411 (35.7)

31 (10.8)

 Spontaneous breathing with non-rebreathing mask

28 (2.4)

4 (1.4)

 Endotracheal tube intubation

713 (61.9)

253 (87.8)

Neuromuscular blocking agent

<0.001^*

 Succinylcholine

84 (7.3)

45 (15.6)

 Aminosteroid derivatives

39 (3.4)

29 (10.1)

 Benzylisoquinolines

456 (39.6)

141 (49.0)

 None

573 (49.7)

73 (25.3)

Inhalation agent

0.99

 Sevoflurane

945 (82.0)

236 (81.9)

 Desflurane

24 (2.1)

6 (2.1)

 None

183 (15.9)

46 (16.0)

Narcotic

0.006^*

 Fentanyl

841 (73.0)

204 (70.8)

 Morphine

100 (8.7)

42 (14.6)

 None

211 (18.3)

42 (14.6)

Anesthetic time (hour)

<0.001^*

 <1

281 (24.4)

27 (9.4)

 1–<3

737 (64.0)

201 (69.8)

 ≥3

134 (11.6)

60 (20.8)

PRAE

<0.001^*

 None

1,130 (98.1)

129 (44.8)

 Upper airway obstruction

0 (0)

9 (3.1)

 Laryngospasm

9 (0.8)

3 (1.0)

 Desaturation

7 (0.6)

126 (43.8)

 Bronchospasm/wheezing

6 (0.5)

21 (7.3)