Table 2 Prediction of hypotension after induction of anesthesia by receiver operating characteristic curves of the carotid artery FTc and ΔVpeak
Parameter | Area under the ROC curve (95% CI) | P | Optimal cutoff value | Gray zone | Patients in gray zone (%) | Sensitivity (%)(95% CI) | Specificity (%)(95% CI) | Youden Index J |
|---|---|---|---|---|---|---|---|---|
Carotid artery FTc (ms) | 0.87(0.78 to 0.93) | < 0.001 | 379.1 | 362.3 to 378.1 | 25(25.3) | 72.2 (54.8 to 85.8) | 93.7(84.5 to 98.2) | 0.659 |
ΔVpeak (%) | 0.67(0.56 to 0.76) | 0.003 | 7.5 | 3.7 to 9.1 | 62 (62.6) | 55.6 (42.5 to 68.1) | 75.0(57.8 to 87.9) | 0.306 |