OBJECTIVE
To determine how weight for gestational age affects urea and mineral excretion by preterm infants receiving total parenteral nutrition (TPN).
STUDY DESIGN
Daily urine samples were collected from all preterm infants given high calcium TPN, providing 30 kcal/g amino acids, during its first 44 months of use, and from all those given standard TPN, providing 25 kcal/g amino acids, over t...