Table 8.
Multiple regression analysis of associated factors which influenced length of hospital stay and the PMA at discharge.
| Item | Regression Coefficient | Lower 95% CI | Upper 95% CI | p Value | VIF | |
|---|---|---|---|---|---|---|
| Length of Hospital Stay (days) |
Room air-HFNC @ | −19.761 | −29.393 | −10.129 | <0.001 * | 1.141 |
| GA | −4.424 | −7.916 | −0.932 | 0.013 * | 3.027 | |
| BBW | −0.013 | −0.038 | 0.012 | 0.301 | 2.770 | |
| NTISS | 0.759 | 0.105 | 1.412 | 0.023 * | 1.254 | |
| 1′ Apgar score | −0.137 | −4.789 | 4.516 | 0.954 | 4.019 | |
| 5′ Apgar score | 3.069 | −1.154 | 7.294 | 0.153 | 3.828 | |
| RDS grade | −1.139 | −7.893 | 5.616 | 0.739 | 1.211 | |
| Intubation after birth | 28.435 | 17.476 | 39.394 | <0.001 * | 1.445 | |
| ROP ≥ stage III | 12.059 | 0.153 | 23.966 | 0.047 * | 1.212 | |
| PMA at Discharge (weeks) | Room air-HFNC @ | −3.284 | −4.567 | −2.001 | <0.001 * | 1.249 |
| GA | 0.005 | −0.421 | 0.431 | 0.979 | 2.816 | |
| BBW | −0.006 | −0.009 | −0.003 | <0.001 * | 2.773 | |
| 1′ Apgar score | −0.210 | −0.800 | 0.379 | 0.481 | 4.166 | |
| 5′ Apgar score | 0.018 | −0.506 | 0.542 | 0.945 | 4.042 | |
| RDS grade | 0.575 | −0.215 | 1.365 | 0.152 | 1.129 | |
| Caffeine-Theophylline ^ | −0.072 | −1.451 | 1.306 | 0.917 | 1.262 | |
| ROP ≥ stage III | −0.448 | −1.826 | 0.929 | 0.520 | 1.068 |
* p value < 0.05; @ Compared room air group to HFNC group; ^ compared Caffeine to Theophylline; NCPAP, nasal continuous positive airway pressure; HFNC, high-flow nasal cannula; CI, confidence interval, VIF, Variance Inflation Factor; RDS, respiratory distress syndrome; GA, gestational age; BBW, birth body weight; ROP, retinopathy of prematurity.