A prospective cohort study of the value of maternal plasma concentrations of angiogenic and anti-angiogenic factors in early pregnancy and midtrimester in the identification of patients destined to develop preeclampsia Prediction of preeclampsia J. P. Kusanovic et al.

Juan Pedro Kusanovic, Roberto Romero, Tinnakorn Chaiworapongsa, Offer Erez, Pooja Mittal, Edi Vaisbuch, Shali Mazaki-Tovi, Francesca Gotsch, Samuel S. Edwin, Ricardo Gomez, Lami Yeo, Agustin Conde-Agudelo, Sonia S. Hassan

Research output: Contribution to journalArticlepeer-review

237 Scopus citations

Abstract

Objective.Changes in the maternal plasma concentrations of angiogenic (placental growth factor PlGF and vascular endothelial growth factor (VEGF)) and anti-angiogenic factors (sEng and vascular endothelial growth factor receptor-1 (sVEGFR-1)) precede the clinical presentation of preeclampsia. This study was conducted to examine the role of maternal plasma PlGF, sEng, and sVEGFR-1 concentrations in early pregnancy and midtrimester in the identification of patients destined to develop preeclampsia. Methods. This longitudinal cohort study included 1622 consecutive singleton pregnant women. Plasma samples were obtained in early pregnancy (6-15 weeks) and midtrimester (20-25 weeks). Maternal plasma PlGF, sEng, and sVEGFR-1 concentrations were determined using sensitive and specific immunoassays. The primary outcome was the development of preeclampsia. Secondary outcomes included term, preterm, and early-onset preeclampsia. Receiving operating characteristic curves, sensitivity, specificity, positive and negative likelihood ratios, and multivariable logistic regression were applied. A p-value of <0.05 was considered significant. Results. (1) The prevalence of preeclampsia, term, preterm, (<37 weeks) and early-onset preeclampsia (<34 weeks) was 3.8 (62/1622), 2.5 (40/1622), 1.4 (22/1622) and 0.6% (9/1622), respectively; (2) Higher likelihood ratios were provided by ratios of midtrimester plasma concentrations of PlGF, sEng, and sVEGFR-1 than single analytes; (3) Individual angiogenic and anti-angiogenic factors did not perform well in the identification of preeclampsia as a whole; in particular, they perform poorly in the prediction of term preeclampsia; (4) In contrast, a combination of these analytes such as the PlGFsEng ratio, its delta and slope had the best predictive performance with a sensitivity of 100, a specificity of 98-99%, and likelihood ratios for a positive test of 57.6, 55.6 and 89.6, respectively, for predicting early-onset preeclampsia. Conclusions. (1) The PlGFsEng ratio and its delta and slope had an excellent predictive performance for the prediction of early-onset preeclampsia, with very high likelihood ratios for a positive test result and very low likelihood ratios for a negative test result; and (2) Although the positive likelihood ratios are high and the positive predictive values low, the number of patients needed to be closely followed is 4:1 for the PlGF/sEng ratio and 3:1 for the slope of PlGFsEng.

Original languageEnglish
Pages (from-to)1021-1038
Number of pages18
JournalJournal of Maternal-Fetal and Neonatal Medicine
Volume22
Issue number11
DOIs
StatePublished - 1 Nov 2009
Externally publishedYes

Keywords

  • Angiogenic factors
  • Anti-angiogenic state
  • Cohort study
  • Early-onset preeclampsia
  • PlGF
  • Placental growth factor
  • Prediction
  • SEng
  • SFlt-1
  • SVEGFR-1
  • Soluble Endoglin
  • Uterine artery Doppler velocimetry
  • Vascular endothelial growth factor

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynecology

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