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Table 1 definition of BPD according to Jobe and Bancalari

From: The VICI-trial: high frequency oscillation versus conventional mechanical ventilation in newborns with congenital diaphragmatic hernia: an international multicentre randomized controlled trial

Gestational age < 32 weeks > 32 weeks
Time point assessment 36 wks PMA* or DC** to home, whichever comes first > 28 days but < 56 days of life or discharge to home, whichever comes first
Treatment with oxygen > 21% for at least 28 days PLUS
Mild BPD On room air at 36 wks PMA or at DC, whichever comes first On room air at day 56 postnatal age or DC, whichever comes first
Moderate BPD < 30% O2 at 36 wks PMA or DC, whichever comes first < 30% O2 at 56 d of life or DC whichever comes first
Severe BPD ≥ 30% O2 and/or pos. pressure at 36 wks PMA or DC whichever comes first ≥ 30% O2 and/or pos. pressure at 56 d of life or DC whichever comes first
  1. *PMA = post-menstrual age
  2. **DC = discharge