Fig. 4From: A novel method for interrogating receiver operating characteristic curves for assessing prognostic tests a–c Equi-PPV and equi-NPV lines corresponding the pre-eclampsia risk in multiparous pregnant women with previous pre-eclampsia (PPV) or without previous pre-eclampsia (NPV). These minimal prognostic performance thresholds are calculated for three different pre-eclampsia prevalence values, as reported for first-time pregnant womenBack to article page