Table 3.
Prognostic Power of PTI and WLI (Pre-Stimulation Values) in Predicting Hemodynamic Response
| Threshold | Sensitivity, % | Specificity, % | AUC (95% CI) | P | ||
|---|---|---|---|---|---|---|
| PTI | MBP (TP1) | >60 | 85.2 | 49.3 | 0.68(0.59–0.76) | <0.01 |
| HR (TP1) | >58 | 88.4 | 66.7 | 0.81(0.74–0.88) | <0.01 | |
| MBP or HR (TP1) | >62 | 80.8 | 71.4 | 0.81(0.73–0.87) | <0.01 | |
| MBP (TP2) | >57 | 79.1 | 81.8 | 0.79(0.71–0.85) | <0.01 | |
| HR (TP2) | >58 | 73.7 | 80.9 | 0.77(0.68–0.83) | <0.01 | |
| MBP or HR (TP2) | >60 | 78.1 | 86.3 | 0.82(0.75–0.88) | <0.01 | |
| WLI | MBP (TP1) | >44 | 77.1 | 49.3 | 0.61(0.52–0.69) | 0.03 |
| HR (TP1) | >43 | 70.5 | 35.9 | 0.51(0.42–0.60) | 0.84 | |
| MBP or HR (TP1) | >49 | 52.5 | 68.6 | 0.58(0.49–0.67) | 0.14 | |
| MBP (TP2) | >47 | 66.7 | 55.5 | 0.62(0.53–0.70) | 0.08 | |
| HR (TP2) | >46 | 68.4 | 49.6 | 0.55(0.47–0.64) | 0.38 | |
| MBP or HR (TP2) | >46 | 68.8 | 51.9 | 0.61(0.52–0.69) | 0.06 |
Note: The asymptotic P-value under the null hypothesis that the true AUC = 0.5.
Abbreviations: TP1, tracheal intubation; TP2, skin incision; post, poststimulus; pre, prestimulus, PTI, pain threshold index; WLI, wavelet index; HR, heart rate; MBP, mean blood pressure.