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Published on: June 29, 2013
sFlt-1/PlGF Ratio Predicts Serious Outcomes in Early-Onset Fetal Growth Restriction
Satoshi Shinohara1, Rei Sunami2, Genki Yasuda1
1Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Japan.
Introduction:
This study aimed to identify a cutoff value for the soluble fms-like tyrosine kinase-1 (sFlt-1)/placental growth factor (PlGF) ratio to predict adverse outcomes in early-onset fetal growth restriction (FGR).
Methods:
In this single-center, non-blinded, retrospective cohort study, maternal serum sFlt-1/PlGF ratios were measured at the time of early-onset FGR diagnosis (<34 weeks) using Roche Elecsys® assays. The optimal cutoff for predicting severe adverse outcomes within 2 weeks was determined using receiver operating characteristic analysis. The Kaplan-Meier analysis assessed delivery probability, and Cox proportional hazards models evaluated factors associated with pregnancy continuation.
Results:
Among 332 patients, 61 (18.4%) delivered within 2 weeks due to worsening FGR. An sFlt-1/PlGF ratio ≥99.0 predicted adverse outcomes leading to an inability to continue the pregnancy, with 85.3% sensitivity and 91.5% specificity (area under the curve: 0.92). Women with ratios ≥99.0 had a significantly shorter time to delivery (p < 0.001). The ratio remained a significant predictor of adverse outcomes in both asymptomatic and preeclampsia-complicated FGR.
Conclusion:
The sFlt-1/PlGF ratio is a strong predictor of short-term adverse outcomes in early-onset FGR, aiding in risk stratification and clinical decision-making.
