Agreement Between Bayley Scales Second and Third Edition Assessments of Very Low-Birth-Weight Infants

The Bayley Scales of Infant Development (BSID) are the most widely used assessments to identify children with developmental delay. Between 1993 and 2006, the BSID–Second Edition (BSID-II)1 was used; in 2006, a third edition (BSID-III)2 was published.