Fig. 5

Performance of the uterine artery indices in distinguishing early-onset or preterm preeclampsia from normal pregnant women. The performance (AUC and Youden index) of the cutoff value of the uterine artery indices in predicting early-onset or preterm cases diagnosed within nine weeks after the Doppler scan shown in panel A (preterm preeclampsia, gestational week < 37), panel B (early-onset preeclampsia, any gestational week), panel C (early-onset preeclampsia, gestational week < 37), and panel D (early-onset preeclampsia, gestational week < 34). Late-onset preeclampsia cases were excluded from the analysis. RPI and LPI: right and left pulsatility index; RRI and LRI: right and left resistance index; AUC: area under the curve