Table 1 Definitions of bronchopulmonary dysplasia.

From: Machine learning to predict late respiratory support in preterm infants: a retrospective cohort study

Definition

NICHD

Jensen

Time Point of Assessment

At 36 weeks’ PMA or at discharge, whichever comes first

At 36 weeks’ PMA or at discharge, whichever comes first

Consideration of oxygen supplement

Treatment with oxygen > 21% for at least 28 days plus

 

Severity or grading of BPD

Mild BPD

Breathing room air

No BPD

Room air, no support

Moderate BPD

Need for oxygen < 30%

Grade 1 BPD

NC ≤ 2L/min “low flow”

Severe BPD

Need for oxygen ≥ 30% and/or positive pressure (PPV or NCPAP)

Grade 2 BPD

NC > 2L/min “high flow,” or NCPAP or NIPPV

Grade 3 BPD

Invasive PPV

  1. BPD Bronchopulmonary dysplasia; GA Gestational age; NC Nasal cannula; NCPAP Nasal continuous positive airway pressure; NIPPV Nasal intermittent positive pressure ventilation; NICHD National Institute of Child Health and Human Development; PMA Postmenstrual age; PPV Positive-pressure ventilation.
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