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PREGNANCY
THROMBOPROPHYLAXIS
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Risk factors
for thromboembolism |
Am J Obstet Gynecol. 2008 Feb;198(2):233.e1-7. Epub 2007 Nov 12.
Incidence and risk patterns of venous thromboembolism in pregnancy and
puerperium--a register-based case-control study.
Jacobsen AF, Skjeldestad FE, Sandset PM.
Department of Obstetrics and Gynecology, Ulleval University Hospital Trust,
Oslo, Norway. anneflem.jacobsen@ulleval.no
Objectives:
This study was undertaken to estimate the incidence of venous
thromboembolism in pregnancy and puerperium and to identify risk factors for
pregnancy-related venous thromboembolism.
Study Design:
A register-based
case-control study with 613,232 pregnancies from 1990-2003 in 11 Norwegian
counties. Medical records for eligible cases were revisited and relevant
medical data were transferred to a specific case-report form. The diagnosis
of venous thromboembolism was based on strict criteria. Data were analyzed
by chi2 test and forward stepwise logistic regression.
Results:
In total,
615 cases were detected. The incidence of venous thromboembolism was 1 per
1000 pregnancies. The ante- and postnatal incidences were quite similar.
Antenatal risk factors were assisted reproduction, gestational diabetes, age
older than 35 years, multiple pregnancies, and primi-parity. Postnatal risk
factors were cesarean section, preeclampsia, assisted reproduction, abruptio
placenta, and placenta previa.
Conclusion:
We found different ante- and
postnatal risk patterns. Assisted reproduction and gestational diabetes were
significant antenatal risk factors; whereas cesarean section and
preeclampsia were strong postnatal risk factors.
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