Fig. 4From: Electrocardiography versus photoplethysmography in assessment of maternal heart rate variability during laborReceiver operating characteristic curves for the detection of fetal acidemia in H2 (top plots) using SampEn(2,0.1), with ECG (left plot) and PPG (right plot), both associated with an auROC of 0.70. A similar analysis for the detection of operative delivery is given in the lower plots, for which an auROC of 0.74 was achieved using mHR in H2 Back to article page