Fig. 4From: Oxygenation index in the first three weeks of life is a predictor of bronchopulmonary dysplasia grade in very preterm infantsPairwise differences between the modeled log-transformed oxygenation index trajectory curves. Red lines represent expected differences in trajectory curves between the indicated BPD groups. The shade represents a 95% confidence interval. The log scale is shown on the left Y-axis, and the linear scale of the corresponding fold difference is shown on the rightBack to article page