Could Low Serum Albumin Level Be an Independent Marker of Severe Preeclampsia?

Background: Preeclampsia (PE) remains a significant cause of maternal and fetal morbidity and mortality, with diagnostic criteria still evolving. Serum albumin, a potential marker of endothelial dysfunction and protein loss, has been proposed as a severity indicator in PE. This study evaluates the clinical utility of serum albumin levels, particularly values below 2 g/dL, in assessing PE severity and predicting maternal-fetal complications. Methods: We conducted a prospective and descriptive study including 59 pregnant women diagnosed with PE. The participants were divided into mild (n = 23) and severe (n = 36) PE groups based on national guidelines. Serum albumin, 24 h proteinuria, renal and hepatic function markers, and fetal outcomes were analyzed. ROC curve analysis was employed to determine albumin's diagnostic performance. Results: Serum albumin levels were significantly lower in the severe PE group compared to the mild PE group (1.82 ± 0.50 vs. 2.44 ± 0.36 g/dL, p < 0.001). ROC analysis identified a threshold of 2.3 g/dL (sensitivity: 88.9%, specificity: 73.9%) for distinguishing PE severity. A strong association was observed between albumin < 2 g/dL and severe proteinuria (>3 g/24 h), but no significant association emerged with renal or hepatic dysfunction, fetal complications, or birth outcomes. Conclusions: Although serum albumin < 2 g/dL is associated with severe proteinuria, it does not independently correlate with other maternal or fetal complications in PE. These findings suggest that albumin may serve as a complementary, but not a standalone, marker in assessing PE severity.