Table 4.
Multivariate hurdle model of factors predicting duration of postoperative oxygen therapy use in children undergoing non-cardiac surgery
| Factor | Adjusted count ratio (95% CI) |
p value |
|---|---|---|
| Probable difficult airway | 2.19 (1.39, 3.48) | 0.0008 |
| History of delayed development | 2.31 (1.49, 3.57) | 0.0002 |
| ASA physical status (Ref: 1) | 0.03a | |
| 2 | 0.75 (0.43, 1.32) | |
| 3 | 1.07 (0.61, 1.88) | |
| Site/type of procedure (Ref: Eye) | <0.0001 | |
| Urologic | 1.98 (0.99, 3.96) | |
| Airway | 3.01 (1.55, 5.83) | |
| Ear-nose-face | 2.27 (1.06, 4.82) | |
| Thoracic | 4.86 (2.34, 10.1) | |
| Intra-abdomen | 4.15 (2.13, 8.11) | |
| Orthopedic | 2.14 (1.08, 4.25) | |
| Intra-cranial | 1.26 (0.52, 3.02) | |
| Gastrointestinal scope | 2.73 (1.23, 6.04) | |
| Cardiac catheterization | 1.18 (0.53, 2.60) | |
| Narcotic used (Ref: None) | 0.049b | |
| Morphine | 0.69 (0.40, 1.20) | |
| Fentanyl | 1.10 (0.72, 1.68) |
Ref Reference group, ASA American Society of Anesthesiologists
aThe contrast of ASA physical status 3 vs ASA physical status 2 gave a significant count ratio of 1.42 and 95% CI of 1.10 and 1.84.
bThe contrast of morphine vs fentanyl gave a significant count ratio of 0.63 and 95% CI of 0.44 and 0.90.