Table 4.
Prediction of composite adverse perinatal outcome using individual Doppler abnormality (n=41)
| Doppler parameters | Sensitivitya % | Specificitya % | Positive predictive valuea % | Negative predictive valuea % | Positive likelihood ratio % |
|---|---|---|---|---|---|
| AoI pulsatility index ≥95th centile | 4.8 | 93.75 | 28.5 | 65.7 | 0.048 |
| AoI absent end-diastolic flow or retrograde diastolic flow | 14.6 | 93.75 | 6.1 | 68.1 | 2.28 |
| Abnormal AoI (high PI or A/REDF) | 19.51 | 87.5 | 44.4 | 67.9 | 1.56 |
| UA pulsatility index >95th centile | 7.3 | 90 | 27.3 | 65.5 | 0.73 |
| UA absent or reversed end-diastolic velocity | 39 | 96.2 | 84.2 | 75.5 | 10.26 |
| Middle cerebral artery pulsatility index <5th centile | 56.1 | 61.3 | 42.6 | 73.1 | 1.44 |
| Ductus venosus pulsatility index >95th centile | 9.8 | 95 | 50 | 67.3 | 1.96 |
| Ductus venosus absent or reversed A-wave | 2.4 | 98.8 | 50 | 66.4 | 2.0 |
| Cerebroplacental ratio <1 | 36.6 | 96.2 | 83.3 | 74.8 | 9.6 |
Composite adverse perinatal outcome compared using chi-square test.
AoI, aortic isthmus; A/REDF, absent or reversed end-diastolic flow; PI, pulsatility index; UA, umbilical artery.
a
Values shown as percentages.
Vasudeva. Clinical utility of aortic isthmus Doppler. Am J Obstet Gynecol Glob Rep 2022.