Table 5.

Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
Admitted to participating NICU between 1/1/14 and 3/31/14 ≥48 h of IV fluids	Age greater than 14 days at admission Congenital heart disease with surgery <7 days of life Lethal chromosomal anomaly; including trisomy 13, 18 and anencephaly Neonatal mortality <48 h