Table 3.
Odds ratios and their 95% confidence intervals for selected variables.
| Unadjusted | Adjusted by GA | Adjusted by GA, SGA, Sex, Postnatal Steroids ** | ||||
| OR | CI95% | OR | CI95% | OR | CI95% | |
| Birth weight * | 0.78 | 0.66–0.93 | 1.03 | 0.80–1.32 | 0.97 | 0.69–1.37 |
| NIPPV as initial support | 2.83 | 1.16–6.87 | 1.03 | 0.34–3.06 | 0.97 | 0.32–2.92 |
| Maximum FiO2 during DR stabilization | 1.15 | 1.08–1.23 | 1.14 | 1.06–1.22 | 1.15 | 1.07–1.24 |
| FiO2 after surfactant | 1.16 | 1.04–1.29 | 1.17 | 1.05–1.31 | 1.17 | 1.05–1.30 |
| Outcomes | ||||||
| BPD | 3.32 | 1.23–8.94 | 1.49 | 0.49–4.55 | 0.53 | 0.10–2.74 |
| Moderate-to-severe BPD | 8.00 | 1.67–38.3 | 6.07 | 1.07–34.4 | 3.77 | 0.61–23.1 |
| Survival without BPD | 0.05 | 0.02–0.15 | 0.07 | 0.02–0.25 | 0.08 | 0.02–0.32 |
| Survival without moderate-to-severe BPD | 0.01 | 0.00–0.07 | 0.02 | 0.00–0.12 | 0.02 | 0.00–0.11 |
| Home supplementary oxygen | 72.0 | 8.55–606.0 | 37.7 | 4.22–337.2 | 96.7 | 8.26–1131.5 |
| Pneumothorax | 24.3 | 2.59–228.8 | 20.2 | 2.01–204.7 | 17.8 | 1.65–192.9 |
| IVH > II | 12.1 | 3.23–45.6 | 5.43 | 1.31–22.4 | 6.22 | 1.36–28.3 |
* every 100 g; ** Adjusted by postnatal steroids only for respiratory outcomes; OR, odds ratio; GA, gestational age; SGA, small for gestational age; BPD, survival without BPD and home supplementary oxygen); NIPPV, non-invasive intermittent positive ventilation; BPD, bronchopulmonary dysplasia; FiO2, fraction of inspired oxygen; IVH, intraventricular hemorrhage.