Document Detail

Changes in the gestational age distribution among U.S. singleton births: impact on rates of late preterm birth, 1992 to 2002.
MedLine Citation:
PMID:  16549207     Owner:  NLM     Status:  MEDLINE    
There is mounting evidence that infants born late preterm (34-36 weeks) are at greater risk for morbidity than term infants. This article examines the changing epidemiology of gestational length among singleton births in the United States, from 1992 to 2002. Analyzing gestational age by mode of delivery, the distribution of spontaneous births shifted to the left, with 39 weeks becoming the most common length of gestation in 2002, compared with 40 weeks in 1992 (P < 0.001). Deliveries at > or =40 weeks gestation markedly decreased, accompanied by an increase in those at 34 to 39 weeks (P < 0.001). Singleton births with PROM or medical interventions had similar trends. Changes in the distribution of all singleton births differed by race/ethnicity, with non-Hispanic white infants having the largest increase in late preterm births. These observations, in addition to emerging evidence of increased morbidity, suggest the need for investigation of optimal obstetric and neonatal management of these late preterm infants.
Michael J Davidoff; Todd Dias; Karla Damus; Rebecca Russell; Vani R Bettegowda; Siobhan Dolan; Richard H Schwarz; Nancy S Green; Joann Petrini
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Seminars in perinatology     Volume:  30     ISSN:  0146-0005     ISO Abbreviation:  Semin. Perinatol.     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-03-21     Completed Date:  2006-08-16     Revised Date:  2006-10-27    
Medline Journal Info:
Nlm Unique ID:  7801132     Medline TA:  Semin Perinatol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8-15     Citation Subset:  IM    
National Office, March of Dimes, White Plains, NY 10605, USA.
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MeSH Terms
Birth Rate / trends*
Gestational Age*
Infant, Newborn
Infant, Premature, Diseases / epidemiology*
Premature Birth / epidemiology*
Retrospective Studies
United States / epidemiology
Erratum In:
Semin Perinatol. 2006 Oct;30(5):313

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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