When does BPD begin?

This is the 50th anniversary of William Northway's description of bronchopulmonary dysplasia (BPD), a chronic pulmonary disease that he recognized as a common consequence of early respiratory failure in the preterm infant. Since that time, advances to reduce the incidence and severity of BPD have been surprisingly few, while the improved survival of extremely preterm babies has allowed the population of at-risk infants to grow substantially. In this month's volume of The Journal, Keller et al provide several new insights from the Prematurity Respiratory Outcomes Program, a large cohort of extremely preterm babies that has been exceptionally well phenotyped through the first year of life for respiratory outcomes.

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