Subject Demographics
At initial hospital discharge, children who required higher levels of supplemental oxygen were more likely to have severe BPD, lower birthweight percentiles, and a diagnosis of pulmonary hypertension compared to those who required less supplemental oxygen (Table 1 ). Additionally, higher levels of supplemental oxygen at initial hospital discharge were associated with older age at discharge (p<0.001), gastrostomy tube placement (p<0.001), and use of diuretics (p=0.005), inhaled corticosteroids (ICS) (p=0.005), and pulmonary anti-hypertension medications (p<0.001). Race/ethnicity and public insurance were not associated with higher supplemental oxygen use at initial hospital discharge; however, there was some variation in oxygen amounts by median household income (p=0.042).