Table 3 Cutoff points, sensitivity, and specificity of parameters related to resistive index
Parameter | Cutoff point | Sensitivity | Specificity | Area under curve | 95% Confidence interval | |
|---|---|---|---|---|---|---|
Minimum | Maximum | |||||
RI before surgery | 0.63 | 50.0 | 22.4 | 0.358 | 0.171 | 0.545 |
RI in the 18th minute | 0.70 | 41.7 | 50.0 | 0.410 | 0.218 | 0.602 |
RI in the 30th minute | 0.71 | 41.7 | 37.9 | 0.351 | 0.172 | 0.529 |
RI changes in the 18th minute | 0.040 | 58.3 | 48.3 | 0.583 | 0.419 | 0.746 |
RI changes in the 30th minute | 0.065 | 58.3 | 58.6 | 0.569 | 0.362 | 0.776 |