Table 1.

Study Population Inclusion and Exclusion Criteria

Infants 30–34 6/7 wks gestational age
Exclusion criteria
 Site hospital length of stay <48 h
 Small for gestational age
 Mechanically ventilated for >3 d
 Supplemental oxygen for >7 d
 Intraventricular hemorrhage of any severity
 Culture-positive infection (blood or urine)
 Known or presumed meningitis
 Necrotizing enterocolitis (medical or surgical)
 Any surgery, including herniorrhaphy