Figure 4

Outcome estimator. BPD Bronchopulmonary dysplasia; Gr Grade; PMA Postmenstrual age. *Had received intubation, epinephrine administration, or chest compression during neonatal resuscitation in the delivery or operation room. **A positive culture report from a blood sample and/or a cerebrospinal fluid sample obtained on day 1, 2, or 3 of life. ***Exogenous surfactant administered at any time or through any pathway.