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. Author manuscript; available in PMC: 2017 Aug 18.
Published in final edited form as: J Pediatr. 2016 Nov 28;181:12–28.e1. doi: 10.1016/j.jpeds.2016.10.082

Table I.

BPD definition with severity

BPD severity Definition (Modified from Jobe and Bancalari4) Relative incidence (Data from Ehrenkranz et al5) Postdischarge mortality (Data from Ehrenkranzet al5)
None O2 treatment <28 d and breathing room air at 36 wk PMA or discharge home, whichever comes first 23.1% 1.8%
Mild O2 treatment at least 28 d and breathing room air at 36 wk PMA or discharge home, whichever comes first 30.3% 1.5%
Moderate O2 treatment at least 28 d and receiving <30% O2 at 36 wk PMA or discharge home, whichever comes first 30.2% 2.0%
Severe (type 1) O2 treatment at least 28 d and receiving ≥30% O2 or nasal CPAP/HFNC at ≥36 wk PMA 16.4% 4.8%
Severe (type 2) O2 treatment at least 28 d and receiving mechanical ventilation at ≥36 wk PMA.

HFNC, high flow nasal cannula; O2, oxygen.