Maternal Risk Factors and Ultrasound Doppler Indices in Pre-Eclampsia: A Comparative Study
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Abstract
Background: Pre-eclampsia is a pregnancy-specific hypertensive disorder associated with maternal and foetal morbidity, and Doppler ultrasonography may support assessment of uteroplacental and fetoplacental haemodynamics. Objective: To compare maternal risk factors and ultrasound Doppler indices among pregnant women with and without pre-eclampsia and assess the diagnostic performance of Doppler parameters. Methods: This comparative cross-sectional study included 79 pregnant women beyond 20 weeks of gestation in a tertiary-care obstetrics and gynecology setting. Maternal clinical variables, proteinuria, blood pressure, and uterine and umbilical artery Doppler indices were recorded. Associations were assessed using chi-square testing, correlation analysis, and receiver operating characteristic analysis, with p < 0.05 considered statistically significant. Results: The mean age was 29.77 ± 6.49 years and mean gestational age was 29.13 ± 5.58 weeks. Pre-eclampsia was diagnosed in 71 participants (89.9%). Proteinuria was significantly associated with diagnosis (χ² = 7.452, p = 0.006). Systolic blood pressure correlated weakly with umbilical artery pulsatility index (r = 0.284, p = 0.011), while diastolic blood pressure correlated negatively with uterine artery resistive index (r = −0.266, p = 0.018). Umbilical artery resistive index showed the highest Doppler discrimination (AUC = 0.663). Conclusion: Doppler indices showed limited standalone diagnostic accuracy, but umbilical artery resistive index may provide supportive haemodynamic information when interpreted with blood pressure and proteinuria
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