Abstract
The Bayley Infant and Child Development Study 3rd Edition (Bayley-III) can be used to objectively evaluate the development of infants and it has been used as a standard test in the US and Europe. In this study, (1) we compared the performance of very low birth weight infants (VLBWI) and extremely low birth weight infants (ELBWI) at 18 months to examine the developmental characteristics, (2) we examined the relationship between three domains (Cognitive, Language, Motor) and the birth data (birth weight, gestational age, head circumference). Additionally, (3) we compared the scores of three domains in each group (ELBWI, VLBWI). All LBWIs examined in this study were born in Toyama University Hospital of NICU between April 2009 and March 2014. Forty-two LBWIs were assessed using the complete Bayley-III at 18 months. The results showed that VLBWI scored higher than ELBWI at composite motion. Scores of ELBWI did not correlate with any birth data, but in VLBWI, the heavier birth weight, the higher gross motor raw score. These results suggest that the development of the motor domain is remarkably different between VLBWI and ELBWI.
