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  • Title: Prognostic significance of serum uric acid in women with gestational hypertension.
    Author: Bellomo G, Venanzi S, Saronio P, Verdura C, Narducci PL.
    Journal: Hypertension; 2011 Oct; 58(4):704-8. PubMed ID: 21876075.
    Abstract:
    Aim of our study was to ascertain, prospectively, whether serum uric acid is a suitable predictor of preeclampsia and/or the delivery of small-for-gestational-age infants in women with gestational hypertension. We screened 206 primiparas, with a singleton pregnancy, referred for recent onset of hypertension. At presentation, we measured serum uric acid, creatinine, blood glucose, hemoglobin and platelet level, and 24-hour proteinuria, as well as office and 24-hour blood pressures. We followed the women until 1 month after delivery and recorded pregnancy outcome. After logistic regression analysis, uric acid resulted a significant predictor of preeclampsia, with an unadjusted odds ratio of 9.1 (95% CI: 4.8 to 17.4; P<0.001); after adjustment for age, gestation week, hemoglobin and platelet levels, serum creatinine, office and 24-hour average systolic and diastolic blood pressures, it was 7.1 (95% CI: 3.2 to 15.7; P<0.001). Regarding the association between maternal serum uric acid and the chance of giving birth to a small-for-gestational-age infant, the unadjusted odds ratio was 1.7 (95% CI: 1.4 to 2.2; P<0.001), and it was 1.6 (95% CI: 1.1 to 2.4; P=0.02) after adjustment. Receiver operating characteristic analysis showed that serum uric acid, at a 309-μmol/L cutoff, predicted the development of preeclampsia (area under the curve: 0.955), with 87.7% sensitivity and 93.3% specificity, and the delivery of small-for-gestational-age infants (area under the curve: 0.784) with 83.7% sensitivity and 71.7% specificity. In conclusion, the results of our study show that serum uric acid is a reliable predictor of preeclampsia in women referred for gestational hypertension.
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