Australian national birthweight percentiles by sex and gestational age for twins, 2001-2010

Li, Z; Umstad, MP; Hilder, L; Xu, F; Sullivan, EA

Australian national birthweight percentiles by sex and gestational age for twins, 2001-2010

Li, Z

Umstad, MP Hilder, L Xu, F

Sullivan, EA

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Publication Type:: Journal Article
Citation:: BMC Pediatrics, 2015, 15 (1)
Issue Date:: 2015-10-08

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Field	Value	Language
dc.contributor.author	Li, Z https://orcid.org/0000-0002-7622-150X	en_US
dc.contributor.author	Umstad, MP	en_US
dc.contributor.author	Hilder, L	en_US
dc.contributor.author	Xu, F https://orcid.org/0000-0002-8465-5834	en_US
dc.contributor.author	Sullivan, EA https://orcid.org/0000-0002-8718-2753	en_US
dc.date.available	2015-09-25	en_US
dc.date.issued	2015-10-08	en_US
dc.identifier.citation	BMC Pediatrics, 2015, 15 (1)	en_US
dc.identifier.uri	http://hdl.handle.net/10453/122593
dc.description.abstract	© 2015 Li et al. Background: Birthweight remains one of the strongest predictors of perinatal mortality and disability. Birthweight percentiles form a reference that allows the detection of neonates at higher risk of neonatal and postneonatal morbidity. The aim of the study is to present updated national birthweight percentiles by gestational age for male and female twins born in Australia. Methods: Population data were extracted from the Australian National Perinatal Data Collection for twins born in Australia between 2001 and 2010. A total of 43,833 women gave birth to 87,666 twins in Australia which were included in the study analysis. Implausible birthweights were excluded using Tukey's methodology based on the interquartile range. Univariate analysis was used to examine the birthweight percentiles for liveborn twins born between 20 and 42 weeks gestation. Results: Birthweight percentiles by gestational age were calculated for 85,925 live births (43,153 males and 42,706 females). Of these infants, 53.6 % were born preterm (birth before 37 completed weeks of gestation) while 50.2 % were low birthweight (<2500 g) and 8.7 % were very low birthweight (<1500 g). The mean birthweight decreased from 2462 g in 2001 to 2440 g in 2010 for male twins, compared with 2485 g in 1991-94. For female twins, the mean birthweight decreased from 2375 g in 2001 to 2338 g in 2010, compared with 2382 g in 1991-94. Conclusions: The birthweight percentiles provide clinicians and researchers with up-to-date population norms of birthweight percentiles for twins in Australia.	en_US
dc.relation.ispartof	BMC Pediatrics	en_US
dc.relation.isbasedon	10.1186/s12887-015-0464-y	en_US
dc.subject.classification	Pediatrics	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Birth Weight	en_US
dc.subject.mesh	Age Distribution	en_US
dc.subject.mesh	Sex Distribution	en_US
dc.subject.mesh	Gestational Age	en_US
dc.subject.mesh	Twins	en_US
dc.subject.mesh	Reference Values	en_US
dc.subject.mesh	Infant, Newborn	en_US
dc.subject.mesh	Infant, Low Birth Weight	en_US
dc.subject.mesh	Infant, Very Low Birth Weight	en_US
dc.subject.mesh	Infant, Premature	en_US
dc.subject.mesh	Australia	en_US
dc.subject.mesh	Female	en_US
dc.subject.mesh	Male	en_US
dc.title	Australian national birthweight percentiles by sex and gestational age for twins, 2001-2010	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	15	en_US
utslib.for	1114 Paediatrics and Reproductive Medicine	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Faculty of Health/Midwifery
pubs.organisational-group	/University of Technology Sydney/Faculty of Health/Public Health
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
utslib.copyright.status	open_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	15	en_US

Abstract:

© 2015 Li et al. Background: Birthweight remains one of the strongest predictors of perinatal mortality and disability. Birthweight percentiles form a reference that allows the detection of neonates at higher risk of neonatal and postneonatal morbidity. The aim of the study is to present updated national birthweight percentiles by gestational age for male and female twins born in Australia. Methods: Population data were extracted from the Australian National Perinatal Data Collection for twins born in Australia between 2001 and 2010. A total of 43,833 women gave birth to 87,666 twins in Australia which were included in the study analysis. Implausible birthweights were excluded using Tukey's methodology based on the interquartile range. Univariate analysis was used to examine the birthweight percentiles for liveborn twins born between 20 and 42 weeks gestation. Results: Birthweight percentiles by gestational age were calculated for 85,925 live births (43,153 males and 42,706 females). Of these infants, 53.6 % were born preterm (birth before 37 completed weeks of gestation) while 50.2 % were low birthweight (<2500 g) and 8.7 % were very low birthweight (<1500 g). The mean birthweight decreased from 2462 g in 2001 to 2440 g in 2010 for male twins, compared with 2485 g in 1991-94. For female twins, the mean birthweight decreased from 2375 g in 2001 to 2338 g in 2010, compared with 2382 g in 1991-94. Conclusions: The birthweight percentiles provide clinicians and researchers with up-to-date population norms of birthweight percentiles for twins in Australia.

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http://hdl.handle.net/10453/122593