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Prediction and primary prevention of pre-eclampsia
Shakila Thangaratinam1, Josie Langenveld, Ben W Mol
1Centre for Health Sciences, Barts and the London School of Medicine and Dentistry, Queen Mary, University of London, UK. s.thangaratinam@gmail.com
Summary
Early recognition of pre-eclampsia is crucial for high-risk pregnancies. While some tests show high specificity, none are accurate enough for routine use; calcium and low-dose aspirin show preventative benefits.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Clinical Prediction
Background:
- Pre-eclampsia significantly increases maternal and perinatal mortality and morbidity.
- Early identification of at-risk women is essential for timely intervention and improved outcomes.
- Accurate prediction and effective prevention strategies are critical in managing pre-eclampsia.
Purpose of the Study:
- To summarize the accuracy of various diagnostic tests for predicting pre-eclampsia.
- To evaluate the effectiveness of different preventative treatments for pre-eclampsia.
- To inform clinical practice regarding pre-eclampsia risk assessment and management.
Main Methods:
- Systematic review of clinical history, examination findings, laboratory tests, and hemodynamic assessments for pre-eclampsia prediction.
- Analysis of treatment options including pharmacological agents, dietary supplementation, and lifestyle modifications.
- Meta-analysis of reported risk ratios (RR) and confidence intervals (CI) for preventative interventions.
Main Results:
- Predictive tests for pre-eclampsia generally exhibit higher specificity than sensitivity; Body Mass Index >34, alpha-fetoprotein, fibronectin, and uterine artery Doppler (bilateral notching) show >90% specificity.
- Uterine artery Doppler resistance index and combined indices offer >60% sensitivity. Kallikreinuria demonstrates high sensitivity (>80%) but requires further investigation.
- Low-dose aspirin reduces pre-eclampsia risk by 10% (RR 0.90). Calcium effectively prevents pre-eclampsia (RR 0.45), particularly in high-risk and low-calcium intake groups (RR 0.22 and 0.36, respectively).
Conclusions:
- No single test is currently accurate enough for routine pre-eclampsia prediction.
- Low-dose aspirin and calcium supplementation are effective preventative measures for pre-eclampsia.
- Pharmacological agents (excluding aspirin), most dietary supplements, and lifestyle modifications lack evidence for preventing pre-eclampsia.
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