Abstract
Purpose
We examine the association between prior C-section and subsequent pre-eclampsia; and describe the effect of gestational age at prior C-section, and obesity status on this association.
Methods
The study population included women with two subsequent singleton births in Missouri between 1998 and 2005. The risk for pre-eclampsia/eclampsia was assessed among women with and without prior cesarean delivery. The two groups were followed to their second pregnancy and the occurrence of pre-eclampsia was documented. Additionally, the history of pre-eclampsia, prior cesarean at preterm, and obesity status were examined for their differential effects on the risk of pre-eclamsia.
Results
Women with prior C-section were 28% more likely to have pre-eclampsia in their subsequent pregnancy [OR = 1.28; 95% CI = 1.20–1.37]. However, this result was not significant when women with pre-eclampsia in their first pregnancy were excluded. After this exclusion, a more than threefold increased risk for subsequent pre-eclampsia was observed in women with prior early C-section [OR = 3.15; 95% CI= 2.43–4.08], while the level of risk did not change in the prior late C-section group [OR = 0.90; 95% CI= 0.82–1.00]. Subgroup analysis suggested that obesity status modified the risk of prior early C-section but did not affect the risk for prior late C-section.
Conclusion
Preterm C-section in the first pregnancy may be associated with subsequent pre-eclampsia regardless of prior pre-eclampsia status.
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Acknowledgments
This work was supported by a grant from the James & Esther King Biomedical Research Program (Grant # 09KN-07-23141) to Dr. Alfred Mbah. The funding agencies did not play any role in any aspect of the study.
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Mbah, A.K., Sharma, P.P., Alio, A.P. et al. Previous cesarean section, gestational age at first delivery and subsequent risk of pre-eclampsia in obese mothers. Arch Gynecol Obstet 285, 1375–1381 (2012). https://doi.org/10.1007/s00404-011-2161-x
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DOI: https://doi.org/10.1007/s00404-011-2161-x