dc.contributor.author |
Allan, Katie |
en |
dc.contributor.author |
Poppe, Katrina |
en |
dc.contributor.author |
North, RA |
en |
dc.contributor.author |
McCowan, Lesley |
en |
dc.date.accessioned |
2011-11-14T20:35:29Z |
en |
dc.date.issued |
2007-09 |
en |
dc.identifier.citation |
American Journal of Obstetrics and Gynecology 197(3):239 e1-239 e5 Sep 2007 |
en |
dc.identifier.issn |
0002-9378 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/9035 |
en |
dc.description.abstract |
OBJECTIVE: Evidence of placental disease and poor perinatal outcome is more common in infants who are small by customized centiles, compared with population centiles. Because preterm births are more likely to be associated with placental pathology, a greater proportion of preterm births are likely to be small for gestational age (SGA) by customized centiles, compared with population centiles. Our objective was to compare the proportion of infants classified as SGA by customized and population birthweight centiles at different gestational ages at delivery. STUDY DESIGN: This was a retrospective observational study of 17,855 nulliparous women delivering between 1992 and 1999 at National Women's Hospital, Auckland, New Zealand. The proportion of SGA infants (birthweight less than the 10th centile) classified by customized and population birthweight centiles delivering at less than 34 weeks, 34-36(+6) weeks, and 37 weeks or longer were compared. RESULTS: A total of 1847 infants (10.3%) were customized SGA, compared with 2111 (11.8%) who were population SGA (relative risk [RR] 0.9, 95% confidence interval [CI] 0.8 to 0.9). Of preterm deliveries less than 34 weeks (n = 392), 29.1% were customized SGA and 17.1% were population SGA (RR 1.7, 95% CI 1.3 to 2.2). Of deliveries at 34-36(+6) weeks (n = 946), 18.0% were customized SGA and 13.7% were population SGA (RR 1.3, 95% CI 1.1 to 1.6). The converse was observed at term (n = 16,517), 9.5% classified as customized SGA and 11.5% as population SGA (RR 0.82, 95% CI 0.77 to 0.87). Of all early preterm perinatal deaths (less than 34 weeks) 31 of 72 infants (43%) were customized SGA and 23 of 72 infants (32%) were population SGA. There were no perinatal deaths or deliveries less than 34 weeks in infants who were classified as SGA by population criteria only. CONCLUSION: Customized centiles classified more infants as SGA, compared with population centiles, in preterm births but not for term births in nulliparous women. |
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dc.publisher |
Elsevier Inc. |
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dc.relation.ispartofseries |
American Journal of Obstetrics and Gynecology |
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dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0002-9378/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Small-for-gestational-age infants classified by customized or population birthweight centiles: Impact of gestational age at delivery |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1016/j.ajog.2007.06.038 |
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pubs.issue |
3 |
en |
pubs.begin-page |
239.e1 |
en |
pubs.volume |
197 |
en |
dc.rights.holder |
Copyright: 2007 Mosby, Inc |
en |
dc.identifier.pmid |
17826403 |
en |
pubs.author-url |
http://www.ajog.org/article/S0002-9378(07)00814-9/abstract |
en |
pubs.end-page |
239.e5 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
92352 |
en |
pubs.org-id |
Liggins Institute |
en |
pubs.org-id |
Medical and Health Sciences |
en |
pubs.org-id |
Population Health |
en |
pubs.org-id |
Epidemiology & Biostatistics |
en |
pubs.org-id |
School of Medicine |
en |
pubs.org-id |
Obstetrics and Gynaecology |
en |
dc.identifier.eissn |
1097-6868 |
en |
pubs.record-created-at-source-date |
2010-09-01 |
en |
pubs.dimensions-id |
17826403 |
en |