Table 5. Comparison of the sensitivity and specificity, PPV, NPV, and diagnostic accuracy of Doppler PI and RI in our study with previous literature.
PPV: positive predictive value; NPV: negative predictive value; PI: pulsatility index; RI: resistance index.
| Author | Doppler indices | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Diagnostic accuracy |
| Jain et al. 2022 [20] | PI | 89% | 87.1% | 87.6% | 88.5% | 88.1% |
| RI | 89% | 87.1% | 87.6% | 88.5% | 88.1% | |
| Reghunath et al. 2021 [10] | PI | 81.8% | 76.4% | 93% | 68.4% | Not available |
| RI | 81.8% | 82.3% | 87.1% | 70% | Not available | |
| Keshavarz et al. 2018 [21] | PI | 90% | 85% | Not available | Not available | Not available |
| RI | 85% | 74% | Not available | Not available | Not available | |
| Sirous et al. 2015 [9] | PI | 70% | 98% | 93% | 88% | 89% |
| RI | 75% | 97% | 90% | 89% | 90% | |
| Elkharbotly et al. 2015 [19] | RI | 77.8% | 78.6% | 90% | 89.2% | 86.7% |
| Our study 2024 | PI | 75% | 95.65% | 60% | 97.8% | 94% |
| RI | 75% | 95.65% | 60% | 97.8% | 94% |