Table 2 Odds Ratio Estimates and 95% CIs for Factors Selected in the Prediction Model Developed
Variables | β | Wald | OR[95%CI] | p |
|---|---|---|---|---|
Respiratory support | ||||
 Oxygen therapy | 0.632 | 1.014 | 1.881[0.550, 6.437] | 0.314 |
 Normal frequency ventilation | 1.400 | 25.322 | 4.040[2.345, 6.958] |  < 0.001 |
 High-frequency ventilation | 2.173 | 7.236 | 8.781[1.803, 42.770] | 0.007 |
Surfactant on Day 1 | 3.055 | 15.603 | 21.221[4.661, 96.622] |  < 0.001 |
Birth weight | -1.358 | 49.296 | 0.257 [0.176, 0.376] |  < 0.001 |