Comparison of the competing risks model for SGA with the RCOG
guideline for the prediction of SGA
The variables used for the comparison are given in Table S2. The ROC
curves for the prediction of stillbirth by the competing risks model
combining maternal risk factors, EFW, and UtA-PI are presented in Figure
2. Prediction of stillbirth by the competing risks model was superior to
that of the RCOG guideline (Table 3, Figure 2). At a screen positive
rate of 21.8 %, as defined by the RCOG guideline, the new model
predicted 79%, 76% and 71% of placental dysfunction related
stillbirths at <32 weeks’ gestation, <37 weeks and
any gestational age and the respective figures for the RCOG guideline
were 42%, 44% and 40%3.