Table 2.

Best ultrasound parameters to predict the outcome of induction.

Best parameter in terms of AUROC	Cervical length (mm)
Best parameter in terms of sensitivity	AFI (cm) and MCA PI
Best parameter in terms of specificity	CPR
Best parameter in terms of positive predictive value	Cervical length (mm) and MCA S/D
Best parameter in terms of negative predictive value	AFI (cm) and MCA PI
Best parameter in terms of diagnostic accuracy	Cervical length (mm)

Abbreviations: AFI, amniotic fluid index; AUROC, area under the receiver operating characteristic curve; CPR, cerebroplacental ratio; MCA PI, middle cerebral artery pulsatility index; MCA S/D, middle cerebral artery systolic/diastolic (S/D) ratio.