Table 1.
Comparison of receiver operating characteristics area under the curve, sensitivity, and specificity between stroke volume, and compensatory reserve index during actual hemorrhage and lower body negative pressure hemorrhage simulation experiments
| Vital Sign | Baseline | Onset of Decompensation | ROC AUC (95% CI) | χ2-Test | P Value | Sensitivity | Specificity |
|---|---|---|---|---|---|---|---|
| Hemorrhage | |||||||
| SV | 56.8 (13.3) | 26.6 (5.4) | 0.84 (0.74–0.95) | 11.75 | 0.0006 | 80.0 | 82.1 |
| CRI | 0.74 (0.18) | 0.05 (0.05) | 0.94 (0.88–1.00) | 80.0 | 92.3 | ||
| LBNP | |||||||
| SV | 60.2 (11.4) | 25.0 (4.4) | 0.92 (0.86–0.98) | 0.369 | 0.5436 | 90.9 | 83.1 |
| CRI | 0.74 (0.11) | 0.07 (0.04) | 0.94 (0.88–0.99) | 81.8 | 94.8 | ||
Values for baseline and onset of decompensation are median ± interquartile range; n = 13. ROC AUC, receiver operating characteristics area under the curve; SV, stroke volume; CRI, compensatory reserve index.