. Author manuscript; available in PMC: 2019 Jan 3.

Published in final edited form as: J Pediatr. 2018 Aug 29;202:56–62.e2. doi: 10.1016/j.jpeds.2018.07.024

Table 4.

Predicted probability of BPD by postnatal age

Postnatal Age (days)	N	BPD Risk Severity^*, median probability (25th, 75th percentiles)
Postnatal Age (days)	N	Mild BPD Risk	Moderate BPD Risk	Severe BPD Risk
1	19,186	0.23(0.13,0.30)	0.24(0.14,0.31)	0.11(0.05,0.17)
3	19,478	0.39(0.28,0.46)	0.24(0.14,0.31)	0.13(0.06,0.21)
7	19,511	0.25(0.15,0.36)	0.27(0.20,0.31)	0.29(0.12,0.44)
14	19,226	0.43(0.27,0.53)	0.39(0.22,0.54)	0.03 (0.02, 0.05)
21	19,011	0.45(0.30,0.54)	0.33(0.19,0.49)	0.05 (0.03, 0.07)
28	18,854	0.38(0.26,0.54)	0.38(0.18,0.63)	0.03 (0.02, 0.05)

BPD, bronchopulmonary dysplasia

Derived from NICHD (Eunice Kennedy Shriver National Institute of Child Health and Human Development) BPD risk estimator which includes: gestational age, birth weight, race, sex, postnatal age, daily ventilator support and highest fraction of inspired oxygen (FiO2).