Main findings
The number of FGR cases defined by SMFM definition, ACOG definition and
ISUOG definition were 115 (4.9%), 63 (2.7%) and 48 (2.1%) separately.
There were 147 (6.28%) cases of SGA neonates and 127 (5.43%) cases
complicated with ANO. As for predicting SGA or a composite ANO, the SMFM
criteria had the highest sensitivity and NPV, while the ISUOG criteria
had the highest specificity and positive predictive value. The AUCs of
SMFM for predicting SGA (0.692) and ANO (0.566) were slightly higher
than those of ACOG (0.616, 0.552) and ISUOG (0.598, 0.552).