TABLE 2.
Predictive factors (univariable and multivariable linear regression model)
| Variable | Univariable linear regression analysis | Multivariable linear regression analysis | ||
|---|---|---|---|---|
| Estimated coefficient (95% CI) n = 53 | p‐value | Estimated coefficient (95% CI) n = 53 | p‐value | |
| Weight at surgery (kilogram) | −0.082 (0.421 to 0.258) | .631 | 0.002 (−0.344 to 0.348) | .991 |
| Mode of ventilation | .019 | — | ||
| Room air | Reference | Reference | ||
| Preoperative nasal oxygen supplementation (yes/no) | 0.738 (0.221 to 1.254) | .006 | 0.706 (0.132 to 1.280) | .016 |
| Preoperative endotracheal intubation (yes/no) | 0.489 (−0.369 to 1.347) | .257 | 0.553 (−0.384 to 1.489) | .247 |
| Major cardiac/Pulmonary problem (yes/no)a | −0.155 (−0.705 to 0.396) | .576 | −0.070 (−0.614 to 0.473) | .799 |
| Duration of surgery (min) | 0.000 (−0.004 to 0.004) | .924 | −0.002 (−0.008 to 0.003) | .432 |
| Highest heart rate (frequency) | 0.006 (−0.010 to 0.022) | .467 | 0.009 (−0.007 to 0.025) | .263 |
| Highest MAP (mmHg) | 0.012 (−0.008 to 0.033) | .229 | 0.019 (−0.003 to 0.040) | .091 |
| Lowest MAP (mmHg) | 0.003 (−0.042 to 0.047) | .909 | −0.008 (−0.051 to 0.035) | .706 |
| Intraoperative lowest pH | −1.784 (−4.337 to 0.768) | .164 | −0.317 (−2.433 to 1.799) | .769 |
| Postoperative days endotracheal intubation (days) | −0.198 (−0.356 to −0.039) | .015 | −0.173 (−0.361 to 0.015) | .071 |
| ICU LOS from surgery (days) | −0.018 (−0.032 to −0.005) | .01 | −0.004 (−0.022 to 0.014) | .645 |
| Number of surgeries first 3 years | −0.117 (−0.180 to −0.055) | <.001 | −0.075 (−0.161 to 0.011) | .089 |
Abbreviations: CI, confidence interval; LOS, length of stay.
a
Only major cardiac anomalies were included. The described preoperatively diagnosed pulmonary problems are the causes of respiratory problems and had been preoperatively confirmed by X‐ray.