phototherapy was most effective in extremely preterm infants with very low birth weight ( gestation less than or equal to 32 weeks , birth weight less than or equal to 1500 g ) and least effective in full term infants with very low birth weight ( gestation greater than or equal to 37 weeks , birth weight less than or equal to 1500 g ) and large preterm infants ( gestation less than 37 weeks , birth weight greater than 2270 g ) .
C0282666
very low birth weight
C0005612
birth weight