First trimester screening for pre-eclampsia in Chinese pregnancies: case-control study.

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Clinical Diagnostics

Background:

• Pre-eclampsia (PE) is a significant cause of maternal and fetal morbidity worldwide.
• Effective screening methods are crucial for early detection and management of PE.
• Previous screening models were primarily developed in Caucasian populations.

Purpose of the Study:

• To evaluate the efficacy of a multi-marker screening approach for pre-eclampsia (PE) in a Chinese population.
• To assess if established screening markers (MAP, UtA-PI, PlGF) require adjustments for local characteristics.
• To compare screening performance against previously published benchmarks.

Main Methods:

• A case-control study involving 3330 pregnant women in Hong Kong.
• Measurement of mean arterial pressure (MAP), uterine artery pulsatility index (UtA-PI), and placental growth factor (PlGF).
• Markers were converted to multiples of the median (MoM) and adjusted; screening performance assessed using AUROC.

Main Results:

• The study identified 30 (0.9%) cases of early or late-onset PE.
• Published models for MAP and UtA-PI MoM distributions significantly deviated from expected values in non-PE pregnancies.
• The multi-marker approach yielded an AUROC of 0.72, with detection rates of 72% for early PE and 55% for late PE at 10% false positive rate.

Conclusions:

• Pre-eclampsia screening detection rates in this Chinese population were lower than anticipated, even after local adjustments.
• Established screening models may not be directly transferable to Chinese populations without modification.
• Further research is needed to refine PE screening strategies for diverse ethnic groups.