Figure 1. The baseline Aa DO²(mean+/-sd) in the breast milk group was greater than those in the infant formula and saline groups ((dagger)P < 0.05). The Aa^DO2in the breast milk group I h after instillation was greater than that in the infant formula group ((double dagger)P < 0.05). The AaDO²in the breast milk and infant formula groups were greater than both their respective baseline measurements and the saline group at all four hourly measurements postinstillation (*P < 0.05). The AaDO²in the saline group did not change significantly at any time postinstillation compared with the baseline measurement.