Respiratory severity score as a predictive factor for severe bronchopulmonary dysplasia or death in extremely preterm infants.

Strong correlations were observed between the RSSs on PND 14, 21, and 28 and death or subsequent severe BPD. The RSS could provide a simple estimate of severe BPD or death., Further research with a larger study population is necessary to validate the usefulness of the RSS for predicting severe BPD or death.