PEDIATRICS Vol. 87 No. 5 May 1991, pp. 587-597
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Very Low Birth Weight Outcomes of the National Institute of Child Health and Human Development Neonatal Network

Maureen Hack MB, BCh1, Jeffrey D. Horbar MD2, Michael H. Malloy MD3, Linda Wright MD3, Jon E. Tyson MD4, and Elizabeth Wright PhD5

1 Case Western Reserve University, Cleveland, Ohio
2 University of Vermont Medical Center, Burlington, Vermont
3 From the National Institute of Child Health and Human Development, Bethesda, MD
4 University of Texas in Dallas
5 The George Washington University Biostatistics Center, Washington, DC

This report describes the neonatal outcomes of 1765 very low birth weight (<1500 g) infants delivered from November 1987 through October 1988 at the seven participating centers of the National Institute of Child Health and Human Development Neonatal Intensive Care Network. Survival was 34% at <751 g birth weight (range between centers 20% to 55%), 66% at 751 through 1000 g (range 42% to 75%), 87% at 1001 through 1250 g (range 84% to 91%), and 93% at 1251 through 1500 g (range 89% to 98%). By obstetric measures of gestation, survival was 23% at 23 weeks (range 0% to 33%), 34% at 24 weeks (range 10% to 57%), and 54% at 25 weeks (range 30% to 72%). Neonatal morbidity included respiratory distress (67%), symptomatic patent ductus arteriosus (25%), necrotizing enterocolitis (6%), septicemia (17%), meningitis (2%), urinary tract infection (4%), and intraventricular hemorrhage (45%, 18% grade III and IV). Morbidity increased with decreasing birth weight. Oxygen was administered for ge28 days to 79% of <751-g birth weight infants (range between centers 67% to 100%), 45% of 751-through 1000-g infants (range 20% to 68%), and 13% of 1001- through 1500-g infants (range 5% to 23%). Ventilator support for ge28 days was given to 68% of infants at <751 g, 29% at 751 through 1000 g, and 4% at >1000 g. Hospital stay was 59 days for survivors vs 15 days for infants who died. Sixty-nine percent of survivors had subnormal (<10th percentile) weight at discharge. The data demonstrate important intercenter variation of current neonatal outcomes, as well as differences in philosophy of care and definition and prevalence of morbidity.

Key Words: very low birth weight • neonates • morbidity • mortality

Submitted on June 21, 1990
Accepted on September 7, 1990




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