Fig. 2From: Trajectories of length, weight, and bone mineral density among preterm infants during the first 12 months of corrected age in ChinaGrowth rate trajectories of weight, length, and bone mineral density (BMD) of preterm infants during the first 12 months of corrected age. Random-effects models adjusted for mothers’ education (less than college, college or more), calcium supplementation during pregnancy (yes, no), outdoor activity during pregnancy (hour/day, continuous), gestational weight gain (kg, continuous), maternal age at birth (year, continuous), gender of the infant (male, female), birth weight (kg, continuous), and birth length (cm, continuous)Back to article page