Forest plot summarizing the findings of the meta‐analysis. A serum uric acid difference of 0.5 mg/dL was considered as clinically important, defining thus a range of equivalence from −0.5 to +0.5 mg/dL. EOPE, early‐onset preeclampsia; HELLP, hemolysis, elevated liver enzymes, low platelets; LOPE, late‐onset preeclampsia; PE, preeclampsia