The postnatal growth of preterm infants is influenced by various factors
however, the association between growth and long-term outcomes in extremely preterm infants remains unclear. Therefore, we aimed to determine the association between 6-year development and body weight (BW) at 36 weeks of corrected age (CA) in extremely preterm infants.We conducted a retrospective observational study including extremely preterm infants born at <
26 weeks of gestation. We defined the key standard deviation score (SDS) using BW at birth and evaluated the association between BW-related values at 36 weeks of CA and the 6-year developmental quotient (DQ).This study included 90 infants. The absolute difference between changes in the BW SDS from birth and the median changes in DQ ≥ 85 infants was significantly greater in infants with a DQ <
85 than ≥85 (median [interquartile range]: 0.80 [0.29, 1.31] vs. 0.34 [0.13, 0.55]