Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Hypertension during pregnancy in South Australia, Part 1: pregnancy outcomes
Author: Heard, A.
Dekker, G.
Chan, A.
Jacobs, D.
Vreeburg, S.
Priest, K.
Citation: Australian and New Zealand Journal of Obstetrics and Gynaecology, 2004; 44(5):404-409
Publisher: Royal Australian NZ College Obstetricians & Gynecologists
Issue Date: 2004
ISSN: 0004-8666
Statement of
Adrian R. Heard, Gus A. Dekker, Annabelle Chan, Danielle J. Jacobs, Sophie A. Vreeburg, Kevin R. Priest
Abstract: Background: There have been conflicting reports about pregnancy outcome in the hypertensive disorders of pregnancy. The present study was undertaken to examine outcomes using a population database. Aims: To examine for differences in a range of pregnancy outcomes between three different groups of hypertensive women and normotensive women in South Australia. Methods: Nine pregnancy outcomes were compared for 70 386 singleton pregnancies in the South Australian perinatal data collection in 1998–2001, consisting of 639 women with pre-existing hypertension, 5356 women with pregnancy hypertension, 448 women with superimposed pre-eclampsia and 63 943 normotensive women. Means for the four groups were calculated for birthweight, gestational age, the baby's and mother's length of stay. The groups were also compared for perinatal deaths with an earlier period, 1991–1997. Results: While all three hypertensive groups had high incidences of induction of labour and emergency Caesarean, only pre-existing hypertension and superimposed pre-eclampsia were significantly associated with elective Caesarean section. All hypertensive groups had increased risks for low birthweight and preterm birth and special and neonatal intensive care. Uncomplicated pre-existing hypertension was not associated with small for gestational age infants, but with preterm delivery between 32 and 36 weeks’ gestation. Superimposed pre-eclampsia had the worst prognosis for perinatal and maternal morbidity. While pregnancy hypertension held the intermediate position, it was not associated with an increase in perinatal mortality. The perinatal mortality rate for women with hypertensive disorders in 1998–2001 was significantly lower than that of an earlier period and equivalent to that for normotensive women. Conclusions: Superimposed pre-eclampsia occurs in approximately 40% of pregnancies of women with pre-existing hypertension and has the most severe outcomes. The hypertensive disorders are associated with high levels of morbidity and intervention, but the high perinatal mortality associated with these disorders has fallen significantly.
Keywords: Humans
Hypertension, Pregnancy-Induced
Pregnancy Complications, Cardiovascular
Birth Weight
Pregnancy Outcome
Length of Stay
Risk Factors
Gestational Age
Infant, Newborn
South Australia
Description: The definitive version is available at
DOI: 10.1111/j.1479-828X.2004.00267.x
Published version:
Appears in Collections:Aurora harvest 4
Obstetrics and Gynaecology publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.