Table 5

- Correlative factors for the severity level of bronchopulmonary dysplasia.

VariablesBSEWald χ2P-valuesOR (95%CI)
BW-9.00E-044.00E-04-2.190.02880.999 (0.998-0.999)
No antenatal corticosteroids0.830.184.61<0.0012.316 (1.620-3.310)
Invasive mechanical ventilation (<7 daya)-1.780.18-10.12<0.0010.169 (0.120-0.238)
RBCTs (<3)-1.440.17-8.55<0.0010.237 (0.171-0.330)
No hsPDA-0.650.17-3.850.0010.524 (0.377-0.729)
No NI-0.650.16-4.10<0.0010.520 (0.380-0.711)
Time to start enteral feeding0.00570.00153.87<0.0011.006 (1.003-1.009)
Total calories up to 110 kcal/kg.d0.01890.00852.210.02681.019 (1.002-1.036)

hsPDA: Hemodynamically significant patent ductus arteriosus, NI: nosocomial infection, OR: odds ratio, CI: confidence interval