Inter-pregnancy interval and risk of recurrent pre-eclampsia : systematic review and meta-analysis
Date
2016-07-18
Journal Title
Journal ISSN
Volume Title
Publisher
BioMed Central
Abstract
Background: Women with a history of pre-eclampsia have a higher risk of developing pre-eclampsia in subsequent
pregnancies. However, the role of the inter-pregnancy interval on this association is unclear.
Objective: To explore the effect of inter-pregnancy interval on the risk of recurrent pre-eclampsia or eclampia.
Search strategy: MEDLINE, EMBASE and LILACS were searched (inception to July 2015).
Selection criteria: Cohort studies assessing the risk of recurrent pre-eclampsia in the immediate subsequent
pregnancy according to different birth intervals.
Data collection and analysis: Two reviewers independently performed screening, data extraction, methodological
and quality assessment.
Meta-analysis of adjusted odds ratios (aOR) with 95 % confidence intervals (CI) was used to measure the association
between various interval lengths and recurrent pre-eclampsia or eclampsia.
Main results: We identified 1769 articles and finally included four studies with a total of 77,561 women. The meta-analysis
of two studies showed that compared to inter-pregnancy intervals of 2–4 years, the aOR for recurrent pre-eclampsia was 1.
01 [95 % CI 0.95 to 1.07, I2 0 %] with intervals of less than 2 years and 1.10 [95 % CI 1.02 to 1.19, I2 0 %] with intervals longer
than 4 years.
Conclusion: Compared to inter-pregnancy intervals of 2 to 4 years, shorter intervals are not associated with an increased
risk of recurrent pre-eclampsia but longer intervals appear to increase the risk. The results of this review should be
interpreted with caution as included studies are observational and thus subject to possible confounding factors.
Description
CITATION: Cormick, G., et al. 2016. Inter-pregnancy interval and risk of recurrent pre-eclampsia : systematic review and meta-analysis. Reproductive Health, 13:83, doi:10.1186/s12978-016-0197-x.
The original publication is available at http://reproductive-health-journal.biomedcentral.com
The original publication is available at http://reproductive-health-journal.biomedcentral.com
Keywords
Preeclampsia, Puerperal eclampsia, Systematic reviews (Medical research), Hypertension in pregnancy
Citation
Cormick, G., et al. 2016. Inter-pregnancy interval and risk of recurrent pre-eclampsia : systematic review and meta-analysis. Reproductive Health, 13:83, doi:10.1186/s12978-016-0197-x