PGF and preeclampsia: In case of the sFlt-1/PlGF ratio, the best model for prediction (R2 = 0.41, p = 4 ×10 − 5) involved two variables: C-peptide levels and the presence of preeclampsia (R2 = 0.30 and 0.49, p = 0.02 and 0.001, correspondingly) (Figure 1c).