Based on a sFlt-1/PlGF ratio ≤38, the NPV for ruling out preeclampsia within 1 week was 100% (95% CI, 97.5–100.0), and the corresponding area under the ROC curve was 95.2% (95% CI, 91.4–98.2) (Fig. 2B). Here, PGF is linked to preeclampsia.