Early diet in preterm babies and developmental status at 18 months

424 preterm infants were randomly assigned a standard "term" formula or a nutrient-enriched "preterm" formula as sole diets (trial A) or as supplements to mother's own expressed milk (trial B) for a median of 4 weeks postnatally. 18 months post term, blind evaluation of 377 survivors showed that those previously fed preterm rather than term formula had major developmental advantages, more so in motor than mental function; the advantages, in both mental and motor scores, were especially striking in small-for-gestational-age infants and in males. For motor development index in trial A, this advantage was 15 points; in infants born small for gestation, it was 23 points (nearly 1·5 SD). Moderate developmental impairment (developmental index