Figure 3: Percent of Patients with Oxygen Use by Treatment Period. Compared to the Vermont Oxford Network (VON) database percentages, a slightly greater percentage of high flow therapy (HFT) group infants were on oxygen at 28 days, but then an appreciably lesser percent of the HFT group infants were on oxygen at 36 weeks and less went home on oxygen. Error bars represent 95% confidence interval for 5 HFT centers.