Jobe and Bancalari summarized proceedings of a National Institute of Health consensus conference on bronchopulmonary dysplasia.[6] Investigators from the National Institute of Child Health and Human Development (NICHD) have validated their recommendations. This group improved the definition of bronchopulmonary dysplasia and attempted to assign a severity score based on oxygen requirements and the need for respiratory support. However, physicians and institutions may set different standards for oxygen requirements and for target ranges for oxygen saturation. This variation in practice may notably influence the incidence and severity of bronchopulmonary dysplasia in a particular neonatal ICU (NICU).