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Prospective risk of abruptio placentae
Author(s) -
Morikawa Mamoru,
Yamada Takahiro,
Cho Kazutoshi,
Yamada Takashi,
Sato Shoji,
Minakami Hisanori
Publication year - 2014
Publication title -
journal of obstetrics and gynaecology research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 50
eISSN - 1447-0756
pISSN - 1341-8076
DOI - 10.1111/jog.12175
Subject(s) - medicine , prospective cohort study , obstetrics , gestation , singleton , gestational age , pregnancy , gynecology , genetics , biology
Aim The aim of this study was to better characterize the nature of abruptio placentae ( AP ) with regard to the timing of onset. Material and Methods Prevalence and prospective risk of AP according to gestational week ( GW ) were determined among 293 899 women who gave birth to singleton infants at and after GW 30. The prospective risk of AP at gestational week N was defined as the number of all women who experienced an AP at ≥ GW N divided by the number of all women who gave birth at ≥ GW N . Results AP developed in 2649 (0.90%) women. The prevalence of AP (6.7% among women who gave birth at GW 30–33) sharply decreased with advancing GW at delivery to 0.9% for GW 37 and 0.1% for ≥ GW 42. The highest prospective risk of AP , 9 per 1000 women at GW 30, decreased linearly with advancing gestation to 1 per 1000 women at ≥ GW 42. AP accounted for 4.7% (1591/33 725) of all preterm births at GW <37, while prevalence of AP was 0.41% (1058/260 174) among term births. Preterm AP accounted for 60.1% (1591/2649) of all AP . Conclusion Our figures indicate that AP is more common in preterm births than in term birth and may be helpful for better understanding the epidemiology of this condition.