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. Author manuscript; available in PMC: 2016 Feb 2.
Published in final edited form as: Arch Dis Child Fetal Neonatal Ed. 2010 Aug 5;96(2):F114–F120. doi: 10.1136/adc.2010.182865

Figure 1.

Figure 1

Derivation of cohort. EPPD=early and persistent pulmonary dysfunction (an FiO2 consistently ≥ 0.23 on all days between 3 and 7 postnatal days and receiving FiO2 > 0.25 on Day 14); PD=Pulmonary Deterioration (an FiO2 < 0.23 on any days between 3 and 7 days and receiving FiO2 > 0.25 on day 14); Low FiO2=consistently low FiO2 (an FiO2 consistently < 0.23 on all days between 3 and 7 postnatal days and receiving FiO2 ≤ 0.25 on Day 14). CLD=chronic lung disease among survivors.