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AbstractBackground/Aims:   Preeclampsia is a complex multi-system obstetric syndrome and remains one of the leading causes contributing to maternal and perinatal mortality and morbidity. Previous epidemiological studies regarding the association between chronic hepatitis B virus (CHB) infection and the risk of preeclampsia have reported inconsistent results. Therefore, we conducted a meta-analysis to investigate the association between CHB infection and preeclampsia.   Methods:   The electronic database was searched until January 1st, 2016. Relevant studies reporting the association between CHB infection and the risk of preeclampsia were included and for further evaluation. Statistical analysis was performed using Stata 10.0 (Stata Corp).   Results:   Three observational cohort studies and eight case-control studies, including 11566 preeclampsia patients, were identified. A significant negative association between CHB infection and preeclampsia was observed (odds ratio = 0.77, 95% confidence interval, 0.65- 0.90, P=0.002, fixed-effect model).   Conclusions:   Findings from our meta-analysis indicate that CHB infection may decrease the risk of preeclampsia in Asian population. Future prospective cohorts in different countries with larger sample sizes are warranted to ascertain the causality and pathophysiological studies are required to explore the possible biological mechanisms involved.

Chronic Hepatitis B Infection is Associated with Decreased Risk of Preeclampsia: A Meta-Analysis of Observational Studies