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Table 1: Classification of bronchopulmonary dysplasia. |
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Gestational age at birth |
< 32 weeks |
> 32 weeks |
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Time of evaluation |
36 weeks postconceptional age or hospital discharge (whichever comes first) |
More than 28 days but less than 56 days postnatal age or hospital discharge (whichever occurs first) |
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Oxygen treatment |
More than 21% during 28 days or more |
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Mild BPD |
Breathes room air at 36 weeks postconceptional age or at discharge (whichever comes first) |
Breathing room air at postnatal day 56 or discharge (whichever comes first)
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Moderate BPD |
Receives supplemental oxygen with FiO2 2 < 30% at 36 weeks postconceptional age or at discharge (whichever occurs first) |
Receives supplemental oxygen with FiO2 < 30% at postnatal day 56 or at discharge (whichever occurs first) |
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Severe BPD |
Receives supplemental oxygen with FiO2 ≥ 30% and/or CPAP or MV at 36 weeks postconceptional age or at discharge (whichever occurs first) |
Receives supplemental oxygen with FiO2 ≥ 30% and/or CPAP or MV at postnatal day 56 or at discharge (whichever occurs first) |
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CPAP = continuous positive airway pressure, BPD = bronchopulmonary dysplasia, FiO2 = fractional inspired oxygen, MV = mechanical ventilation. Adapted from: Jobe A, et al.3 |
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