Table III.
Sensitivity, specificity, positive and negative predictive value and likelihood ratio of Doppler tests in prediction of FHR disturbances (in CTG) at delivery
| Doppler test | Sensitivity | Specificity | PPV | NPV | LR | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| % | 95% CI | % | 95% CI | % | 95% CI | % | 95% CI | |||
| CTG | C/U | 74.1 | 0.61–0.85 | 71.1 | 0.61–0.80 | 62.3 | 0.50–0.74 | 81.0 | 0.71–0.89 | 2.6 |
| MCA RI | 12.0 | 0.05–0.23 | 91.1 | 0.83–0.96 | 46.7 | 0.21–0.73 | 61.6 | 0.53–0.70 | 1.3 | |
| MCA PI | 56.9 | 0.43–0.70 | 77.8 | 0.68–0.86 | 62.3 | 0.48–0.75 | 73.7 | 0.64–0.82 | 2.6 | |
| UA RI | 32.8 | 0.21–0.46 | 87.8 | 0.79–0.94 | 63.3 | 0.44–0.80 | 66.9 | 0.58–0.75 | 2.7 | |
| UA PI | 27.6 | 0.17–0.41 | 91.1 | 0.83–0.96 | 66.7 | 0.45–0.84 | 66.1 | 0.57–0.74 | 3.1 | |
FHR – fetal heart rate, CTG – cardiotocography, PPV – positive predictive value, NPV – negative predictive value, LR – likelihood ratio, CI – confidence interval, C/U – cerebroplacental ratio, MCA – middle cerebral artery, RI – resistance index, UA – umbilical artery, PI – pul-satility index.