Format

Send to

Choose Destination
See comment in PubMed Commons below
BMJ. 2006 Apr 22;332(7547):937-9. Epub 2006 Feb 23.

Spontaneous preterm delivery in primiparous women at low risk in Denmark: population based study.

Author information

1
Juliane Marie Centre, Department of Obstetrics, Rigshospitalet, DK-2100 Copenhagen, Denmark. jlr@dadlnet.dk

Abstract

OBJECTIVES:

To analyse trends in preterm delivery and the factors contributing to preterm delivery in Denmark. To construct a standard population at low risk (white European, 20-40 years of age, with a singleton spontaneous pregnancy) and describe the changes in this population so that time trends can be compared internationally.

DESIGN:

Population based study.

PARTICIPANTS:

99.8% of all deliveries in Denmark, 1995-2004.

MAIN OUTCOME MEASURES:

Proportion of babies born at less than 37 weeks' completed gestation for each year in the overall population and in a standard population at low risk.

RESULTS:

Overall, the proportion of preterm deliveries increased by 22% from 1995 to 2004. During the same period, known risk factors for preterm delivery such as in vitro fertilisation, multiple pregnancies, and elective deliveries also increased, and logistic regression analyses showed that these factors were associated with an increased risk of preterm delivery. Spontaneous preterm deliveries in primiparous women at low risk rose 51% (from 3.8% to 5.7%) during this time compared with 20% (2.7% to 3.2%) in multiparous women at low risk.

CONCLUSIONS:

The overall proportion of preterm deliveries increased significantly from 1995 to 2004 and primiparity and multiple birth were the most important contributing factors. The rise in spontaneous preterm deliveries in the standard population of primiparous women at low risk was greater than in the total population.

PMID:
16497733
PMCID:
PMC1444877
DOI:
10.1136/bmj.38751.524132.2F
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Support Center