RCOG, Royal College of Obstetricians and Gynaecologists; SGA, small for gestational age; SPR, screen positive rate
Competing risks model uses maternal and pregnancy characteristics and medical history, sonographic estimated fetal weight uterine artery pulsatility index.
The SPR was the one that was derived from the RCOG guideline.
McNemar’s test was used to compare detection rates of the competing risks model and that of the RCOG guideline.