Differences in growth curves. Blue lines are the 10th, 50th, and 90th percentile curves plotted from data in the Pediatrix Medical Group, Inc, database. Green lines are the 3rd, 50th, and 97th percentile curves plotted from the data of Usher and McLean.2 Red lines are the 10th, 50th, and 90th percentile curves plotted from the data of Lubchenco et al.1 Curve A indicates birth weight; B, birth length; and C, birth head circumference.
The gestational age-specific difference in birth weight between male and female neonates and between white and black neonates. They-axis is the average weight differences that were calculated from our dataset. The x-axis is gestational age.
Birth weight- and EGA-specific mortality rates. The dashed lines of the figure represent the 10th and 90th percentile weights based on our cohort. The grid lines are plotted by each gestational age and in 250-g weight increments as previously done by Lubchenco et al.1Each number in the box is the percent mortality rate for the grid defined by gestational age and birth weight range.