Variables | Optimal cut-off | AUC (95% CIs) | Sensitivity (95% CIs) | Specificity (95% CIs) | PPV | NPV | P value ( versus Oxy-Hb) |
---|---|---|---|---|---|---|---|
Oxy-Hb | 5.5 | 0.87 (0.83 – 0.91) | 77.3% (72.4 – 82.1) | 85.0% (83.2 – 86.7) | 47.9% | 95.4% | N/A |
rSO2 | 40% | 0.83 (0.78 – 0.88) | 80.0% (75.3 – 84.6) | 78.6% (76.5 – 80.6) | 40.0% | 95.6% | < 0.001 |
Hb | 13.0 g/dl | 0.77 (0.70 – 0.81) | 73.3% (68.1 – 78.4) | 70.2% (69.7 – 72.4) | 30.5% | 93.6% | < 0.001 |
Base excess | −18.7 mM | 0.68 (0.63 – 0.74) | 96.0% (93.7 – 98.2) | 37.4% (35.0 – 39.7) | 21.4% | 98.1% | < 0.001 |