TABLE 1

Baseline Patient Characteristics

Patient CharacteristicsUS-VONSNN
Infants 501–1500 g birth wt123 6892209
Mean GA (SD)28.6 (2.9)29.2 (2.9)
Mean birth wt (SD)1058 (285.9)1087 (284.2)
SGA21.4%27.7%
Male sex50.7%50.7%
Multiple birth (eg, twins, triplets)26.9%34.3%
Major malformations5.0%4.4%
Chorioamnionitis12.7%25.9%
Maternal hypertension31.2%23.0%
Prenatal care96.2%100%
Inborn86.0%94.9%
Apgar1 <428.6%27.5%
Apgar5 <48.6%9.8%
Ethnicity, Asian4.4%3.2%
Ethnicity, Black29.9%3.7%
Ethnicity, white55.0%92.9%
Ethnicity, other10.5%0.2%
Total length of stay in d (SD)a71.1 (42.4)65.0 (40.5)
  • a Mean value of infants discharged from the hospital alive.